The present invention is drawn to a wall structure that may be adapted for use in many applications. Specifically, the present invention is a wall structure that may be used in a variety of interior and exterior applications, for example, as a skirting wall, as wainscoting, as a small retaining wall, as a pool wall, as a veneer or fascia, as cladding or siding, as a fence, and as a load-bearing or non load-bearing wall.
Transportable structures such as mobile homes, trailer homes, modular homes and recreational vehicles are usually not built upon a conventional foundation. Rather, they are brought or driven to a location where they remain for indeterminate periods of time. Often, over an extended period at a particular site, such structures may start to settle onto or in the ground due to factors such as deflating tires or weight of the structure. Or, settling may be the result whether related factors such as erosion and freeze-thaw cycles. As a result, such structures may shift and/or sink. In order to prevent shifting and sinking of these structures, and moreover to ensure the structure is level regardless of the ground's topography, they are usually placed on stilts or supports that extend from the ground and elevate the structure thereabove. While this solves the aforementioned problem of shifting and/or sinking, it causes an unsightly visible gap in the area between the ground and the bottom of the structure.
Various attempts to cover the unsightly visible gap have included the use of plants, rocks, wood, plastic and masonry blocks. These structure skirting efforts were either prohibitively expensive, difficult to install, or unattractive and unable to withstand sustained exposure to nature's elements. Solutions that tend to be prohibitively expensive or difficult to install include large, custom-made, cement slabs having a decorative face, and the use of standard cinder blocks and mortar to build a wall around the bottom of the structure. Attempts that fall into the latter category include such easily breakable products as wooden or plastic lattices and plastic or foam panels that imitate a stone or brick wall. Consequently, there is a need for a sturdy, inexpensive, easily assembled wall structure for skirting a transportable structure such as a mobile home.
In other applications, where brick, stone, or concrete is used as veneer or fascia, for fencing, and as load-bearing and non load-bearing walls, these structures are typically non-transportable and permanent in nature. That is, the component parts are assembled as part of a larger structure that are not intended to be easily dismantled. With veneer, for example, a substantial portion of the rearwardly facing surface is typically coated with adhesive or cementatious material to enable the veneer to be securely and directly bonded to a structure. As another example, walls may be constructed in a conventional manner with blocks and mortar, or they may comprise heavy blocks that interlock with each other without the use of mortar. As one may well imagine, it is very difficult and time consuming to reconfigure, remove or repair such structures. In addition, the erection of these structures typically requires specialized knowledge and skills to achieve. In light of these shortcomings, there is an additional need for a wall structure that may be easily assembled, disassembled and rebuilt or reconfigured by an unskilled user without damage to the constituent parts of the wall structure and which may be used as a veneer, fascia, cladding, fence, or as a load-bearing or non load-bearing wall.
One embodiment of the present invention provides a composite masonry block and wall system to be used to skirt elevated structures. The block is shaped to be stacked in vertically independent columns, held in place by specially shaped, lightweight, support beams placed between adjacent columns, and also by U-shaped lateral supports which open downwardly and are attached to the bottom of the elevated structure.
Preferably, the blocks comprise a split front face, a rear face, top and bottom surfaces, and side surfaces. The side surfaces include grooves for receiving supporting portions of the support beams. The top and bottom surfaces are preferably shaped so that when an upper block is stacked on a lower block, the lower surface of the upper block sits on the upper surface of the lower block and the two blocks are relatively coplanar and vertical. This configuration is most easily accomplished using blocks having flat top surfaces and flat bottom surfaces that are relatively perpendicular to the front and rear faces. It would also be possible to accomplish this vertical block-to-block relationship using top and bottom surfaces comprised of complementary angles and/or curves.
The support beams are preferably a weather resistant metal or plastic, nylon or other synthetic, durable, inexpensive material, such as poly-vinyl chloride (PVC). The purpose of the beams is to keep the independent vertical columns from buckling when subjected to a force normal to the plane of the wall. The rigidity of the blocks provides enough support to prevent failure in other directions. This purpose may be accomplished using relatively thin beams having lateral extensions for being received by the grooves in the sides of the blocks.
Preferably, the beams serve to stabilize and maintain the blocks in independent vertical columns and they provide little or no support in the vertical direction. The columns are considered independent because, unlike conventional brick or stonewalls, one horizontal course of blocks is aligned with the adjacent upper and lower courses so that the blocks in each course are in line with the blocks above and below them, as opposed to being laterally offset. This results in the formation of vertical columns of blocks that can move up and down, due to forces exerted by the ever-shifting earth, without upsetting, or otherwise exerting forces on, adjacent columns of blocks.
The resulting wall of this system is surprisingly strong. It may even be used to provide support to the elevated structure. Once installed the elevated structure may be lowered onto the blocks. Alternatively, the blocks may merely serve as a skirt, which improves the aesthetics of the structure and keeps unwanted birds and animals from nesting or otherwise residing under the structure. In this embodiment, it is not necessary that the blocks make actual contact with the structure.
The use of the lateral support beams also obviates the need for mortar between the blocks. This mortarless system is advantageous over traditional brick and mortar walls for obvious reasons. First, fewer materials are required to build a wall. Thus the cost of transporting the materials to a site is reduced. Second, great physical strength and stamina are not required because the materials used are lighter. Moreover, since less stamina is required, a person is able to work for longer periods of time without breaks. And, because of the relative lightness of the materials used, on the job injuries due to overexertion and/or fatigue are reduced. Third, no special skills are required to construct a mortarless wall structure. Fourth, a mortarless wall structure may be constructed by one person. Thus the need for an additional person to mix and deliver mortar at a site is eliminated—further reducing cost of construction. Fifth, since there are no time constraints imposed by drying mortar, a person can construct a wall at their own pace. Sixth, a mortarless wall structure may be constructed under conditions, which, for a conventional block and mortar wall, would be extremely difficult or impossible. Also, the loose block system may be constructed on a wide variety of surfaces, including soils such as sand, gravel, or dirt, concrete, or construction elements such as wood or steel beams, flooring, sills, thresholds, etc.—it is not necessary to pour a foundation.
The lateral support beams also allow the use of relatively thin blocks. These thin, wafer-like blocks are relatively lightweight, resulting in ease of handling and shipping, and a reduction in material costs. The blocks are preferably between 1 and 4 inches (2.5–10 cm.) thick, more preferably on the order of 2½ inches (6.0 cm.) thick. As they are generally between 6 and 12 inches (15–30 cm.) in height and between 6 and 24 inches (15–60 cm.) in width, it would be difficult to use such a tall thin block to create a brick wall using mortar. The tall, thin blocks would have to be held in place somehow to allow the mortar to dry. However, tall thin blocks provide certain advantages and the present invention provides a way of incorporating the advantageous of such a block. These advantages include an increased front face surface area, resulting in a more attractive wall. The design also provides increased lateral support, ideal for use with such a beam system.
The loose block system also allows the wall to be disassembled and reassembled. This not only gives flexibility during initial construction, but also allows later renovations to be made easily and inexpensively. For instance, may be desirable to vent wall structures such as skirting walls to prevent the buildup of moisture or condensation between the ground and the elevated structure. These vents can be easily installed into an existing wall, especially if they are of similar dimensions and configurations as the blocks. The blocks of a given column are simply removed and reinstalled, replacing one of the blocks with the vent. Other auxiliary items, such as an access door or lights, could be installed in a similar manner.
The wall design of the present invention also allows a wall corner to be constructed without supporting beams or mortar. Two walls are simply aligned to form a butt joint and fasteners such as appropriate plastic pegs or screws and plastic inserts are used to fasten one wall to the other. Alternatively, construction mastic, or a similar type of adhesive, may be applied instead of or in combination with the screws. Again, ease of installation is greatly improved by the loose block, mortarless system of the present invention.
Another embodiment of the present invention is well suited for use as a veneer or as wainscoting. In this embodiment, the support beam also includes one or more leg structures that extend from the support beam toward a structure over which the wall structure will be applied as a veneer. The leg structure comprises a leg and a foot that are preferably arranged at right angles to one another and to the support beam, but which may be constructed at any appropriate angle.
A double-ended support beam is useful in adapting the wall structure of the present invention to the creation of a double-sided wall. In this embodiment of the present invention, two block engaging structures comprising a web and at least one rib extending therefrom are coupled together in a spaced apart relationship by a spacer or web. The respective block engaging structures engage the grooves between the side edges of adjacent block columns of respective wall faces to couple the wall faces together.
Another embodiment of the support beam of the present invention is useful in constructing walls having a single face. In this embodiment, the support beam comprises a block engaging structure that extends from a solid or hollow elongate post. The block engaging structure of this support beam preferably comprises a web having extending therefrom a pair of ribs that are constructed and arranged to engage the opposing grooves formed in the side surfaces of adjacent block columns in the wall face. The post portion of this support beam can be secured directly to a wall support structure such as a foundation, footing, ledge, or bracket. Where the post portion of the support beam is hollow, the support beam can be slipped over a structural member that is secured directly to a wall support structure such as a foundation, footing, ledge, or bracket.
In another embodiment of the support beam, the web includes an extension portion and an attachment member that may be operatively connected to a substructure by fastening elements, adhesive, clips, or two-part fasteners, for example. When the attachment member is operatively connected to a substructure, the extension portion positions the ribs of the support beam (and hence the blocks of the support wall) away from the substructure in a spaced relation. The setoff provided by this embodiment greatly increases the number of uses of the wall structure because the space between the wall structure and the substructure is now available for other uses such as conduits, plenums, additional insulation, etc. The blocks used in this embodiment are preferably symmetrical and may be reversed, if desired.
Another embodiment of the wall structure uses elongated blocks that have been provided with one or more transverse channels that are configured to operatively engage a support beam which, in turn, is operatively connected to a substructure. The elongated blocks may also be provided with complimentarily shaped projections and recesses at opposing sides that serve to align adjacent blocks and strengthen the wall structure. As with the previous embodiment, a wall structure using these blocks may be setoff from the substructure to which it is operatively connected and the space therebetween may be available for other uses.
Still another embodiment of the wall structure uses elongated blocks that are operatively connected to each other by a plurality of pegs that are operatively connected a substructure by webs, and support beams. These elongated blocks are also provided with complimentarily shaped projections and recesses at opposing sides that serve to align adjacent blocks and strengthen the wall structure. As with the previous embodiment, a wall structure using these blocks may also be setoff from the substructure to which it is operatively connected and the space therebetween may be available for other uses.
A final embodiment of the wall structure includes a support beam having forwardly facing, viewable surface. The viewable surface may be provided with a surface which is similar to the blocks it is retaining, or it may be provided with a contrasting surface. Alternatively, the viewable surface of the support beam may be provided with an additional cap or strip of material similar to that of the blocks of the wall structure, and the cap or strip may be otherwise textured or modified. The blocks used in conjunction with this support beam include single opposing, laterally extending, aligned fingers that are offset from the center plane of the blocks in an coplanar relation and which enable the blocks to be operatively connected to a support beam or beams in several orientations. The blocks have front and rear faces which may have similar or different surface textures and designs. As with the earlier described embodiment the blocks may be reversed if desired, so that either the front face or the rear face may be viewed. With the support beam and block of this embodiment, a wide variety of visually distinctive surfaces as well as a conventionally configured surfaces are possible.
These and other objectives and advantages of the invention will appear more fully from the following description, made in conjunction with the accompanying drawings wherein like reference characters refer to the same or similar parts throughout the several views. And, although the disclosure hereof is detailed and exact to enable those skilled in the art to practice the invention, the physical embodiments herein disclosed merely exemplify the invention, which may be embodied in other specific structure. While the preferred embodiment has been described, the details may be changed without departing from the invention, which is defined by the claims.
Referring now to the drawings and first to
Attention is now directed to the individual components of wall system 10.
Front face 20 is forwardly spaced from rear face 22 by a predetermined distance herein defining the depth 30 of block 12. As shown in
Top surface 24 is separated from bottom surface 26 by a distance defining the height 32 of block 12. When blocks 12 are arranged vertically to form a column 14, bottom surface 26 of any block 12 other than the bottom block of a column, rests on the top surface 24 of the block below. It is therefore preferred that top surface 24 and bottom surface 26 are so shaped to facilitate a stacking relationship between two blocks 12 that results in an upper block 12 resting vertically on a vertically oriented lower block 12. This relationship is most easily achieved by making top surface 24 and bottom surface 26 flat and relatively perpendicular to rear face 22 and/or front face 26, as shown in the Figures. Alternatively, it is envisioned that top and bottom surfaces 24 and 26 be comprised of complementary angles which are not perpendicular to rear face 22 and/or front face 26, but result in the vertical relationship between upper and lower blocks 12, described above. It is also envisioned that this relationship be achieved through the use of concave and convex surfaces or using tongue and groove configurations.
Side surfaces 28A and 28B, as shown in
Beams 16, shown in
The distance between rib 38A and 38B is herein defined as the span 42 of the rib. The span 42 should either be as great as the distance between the groove 34 and the rear face 22, or, in the case of the resiliently deformable rib 38, should be able to achieve this distance through deformation when installed into the groove 34 of a block 12.
Beams 16 may or may not be attached at their upper ends to the structure being skirted, at or near its bottom. Attaching beams 16 thusly provides support and stability to the independent columns 14, preventing them from leaning or falling forwardly or rearwardly. Beams 16 also act to align the blocks 12 of a given column 14, ensuring that the blocks maintain a somewhat coplanar relationship.
It is envisioned that brackets 18 be used in conjunction with beams 16 to provide stability to wall 10. Referring now to
Brackets 18 prevent rearward or forward movement of column 14 and also work in conjunction with beams 16 to prevent those columns 14 without brackets 18 from tipping over rearwardly or forwardly. As it is envisioned that beams 16 may or may not be attached to the structure, brackets 18 may be solely responsible for preventing wall 10 from tipping over. Brackets 18 can be of any suitable material, preferably synthetic, more preferably poly-vinyl chloride (PVC) or other durable plastic. It may be advantageous to make brackets 18 and beams 16 out of similar material.
In order to prevent the inflow of water into the wall structure 10, it may be desirable to apply a bead of a waterproof material 90 such as mastic or caulk along the top surface 24 of the blocks 12. The bead of waterproof material 90 forms a seal between the upper surface 24 of the lower block 12 upon which the bead has been placed and the lower surface 26 of the block 12 immediately above the lower block.
Legs or leg portions 60 of support beam 16 preferably extend rearwardly from ribs 38B in a perpendicular relationship thereto. Similarly, it is preferred that the feet 64 of the support beam 16 extend laterally perpendicular to the legs 60. The perpendicular relationship of the feet and legs to the remainder of the support beam 16 is the preferred embodiment thereof, it must be kept in mind that the purpose of the legs 60 and feet 64 is to provide and offset for the block wall 10 from the wall of the existing structure 62. This offset allows a block wall 10 to be secured over uneven surfaces such as the steel siding 72 illustrated in
Preferably the support beam 16 of the present invention will be extruded or molded from a material such as a plastic, a fiber reinforced resin, or a metal such as aluminum. In addition to forming embodiments of support beams 16 having the respective profiles of the support beams illustrated in
With reference to
Preferably, the blocks 112 are symmetrically formed, so that either the front or rear face 120,122, respectively, may face forwardly. This feature allows a block which has been damaged or had its surface otherwise altered to be easily removed and reinstalled by merely turning the block around (or over) so that other good or undamaged side now being the viewable surface of the block. In other words, the blocks are reversible. The front and rear faces need not have the same surface treatment. That is, a block may have a smooth front face and a roughened rear face. Or, a block may have roughened front face and a decorated or non-planar rear face. For example, in
With reference to
Referring now to
The span 174 of the bracket 170 serves to position the support beam 116 a predetermined distance from a substructure while the substructure engaging portion 172 serves to attach the bracket 170 onto a substructure. As with the aforementioned embodiment the bracket 170 may be operatively connected to a substructure using a variety of fastening elements. It will be appreciated that the support beam 116 of this embodiment may be used with an additional bracket 170, if desired, to form a more robust connection between the wall structure and a substructure.
Referring now to
With this embodiment, the support beam 116 is not directly connected to a substructure but is operatively connected to a bracket 180 that is, in turn, operatively connected to a substructure 100 (shown in dashed lines). This bracket 180 includes substructure engaging portions 182, 184, a span 186 and an attachment member 188. Preferably, the attachment member 188 is a dart-shaped head 190 having shoulders 192, 194 which are configured to engage arms 156, 158 in a constrained relation. That is, the attachment member 146 of the support beam is sized to slidingly receive the attachment member 188 within a slot 160 and channel 162 formed by the resilient walls 152, 154 and their confronting arms 156, 158. Thus, support beam 116 may be connected to bracket 180 in a constrained manner. It will be appreciated that support beam 116 may be operatively connected to a bracket 180 in several ways. For example, by positioning the channel 162 and the slot 160 attachment member 146 over the dart-shaped head 190 and the span 186 of the attachment member 188 of bracket 180 and then sliding the support beam 116 down along the bracket 180 and interconnecting with an already positioned block, or sliding down along the bracket and later interconnecting with a block which is slid into position in a similar manner. Alternatively, a support beam 116 may be operatively connected to a bracket 180 by aligning the slot 160 of the attachment member 146 opposite the apex of the dart-shaped head 190 and then pushing the support beam 116 towards the dart-shaped head 190 until the arms 156, 158 of the attachment member 146 engage the shoulders 192, 194 of the dart-shaped head 190.
Support beam 116, like the support beam of
Referring now to
Referring now to
Other combinations of operative connections may also be used. For example, the post 220 may be provided with two direct connectors (webs with laterally extending ribs) or the post 220 may be provided with two indirect connectors (attachment members, such as channels). As will be appreciated, the post 220 may be operatively connected to a substructure such as a footing or foundation, or be set into the ground using known techniques and technologies. While the post 220 is depicted as having a hollow cross section, it is understood that the post 220 may also be a solid in cross section or may have a reinforcing structure such as a pipe or a rod received therein.
Referring now to
Referring now to
Referring now to
Referring now, to
Unlike the previous embodiment, the operative connection between the blocks 279 and a support beam 260 is indirect. That is, the extension 262 of the support beam 260 terminates in a dart-shaped head 268 that extends away from the beam and is configured to operatively connect to a web 298, which, in turn is operatively connected to blocks 279 of a wall structure 304. As depicted in
With reference to
Referring now to
Each block 312 differs from the block 112 depicted in
Another difference between block 312 and block 112 is that the opposing laterally extending, aligned fingers 328A, 328B are offset from the center plane of the block 312. As can be seen in
It will be appreciated that the opposing, laterally extending, aligned fingers of the aforementioned blocks (312) may be aligned with the center plane of a block if desired. And, it will also be appreciated that wall structures other than linear structures are possible. For example, the support beams and blocks may be used to construct circular, or sinuous structures by providing curved blocks or blocks with one curved viewable surface (when viewed cross-sectionally from a point above the top surface of the block) that are operatively connected to support beams that are similarly arranged. Or, a wall structure may be constructed in a zigzag or erose form with the support beams collaterally arranged relative to each other in a zigzag manner. To reduce vertical gaps between forwardly facing viewable surfaces of adjacent blocks in such a wall structure, it would be a matter of providing support beams with ribs that are angled with respect to the web, mitering or beveling the opposing sides of the blocks, or using a combination of both angling and mitering the ribs and sides, respectively. A similarly configured wall may also be constructed using support beams arranged in a coplanar fashion relative to each other and blocks having a predetermined, angular viewable surface (when viewed cross-sectionally from a point above the top surface of the blocks). For example, a V, L, or a W. Such blocks may have parallel front and rear faces, if desired. With such a construction, neither the support beams nor the opposing fingers need to be modified. In a related construction, it is envisioned that blocks be constructed having angles of ninety degrees so that they may be used as inner or outer corners. With such blocks, the opposing sides and their fingers would be perpendicular to each other.
To construct a freestanding, low wall structure of the present invention, a person would prepare or otherwise select an appropriate location in which to construct a wall. The construction would begin by placing a first block having opposing side grooves in a desired position and orientation. Then, a second, similar block would be placed directly on top of the first block so that the opposing side grooves of the first and second blocks are in vertical alignment with each other and the first and second blocks form a column. Next, the first and second blocks would be operatively connected to each other along their respective sides by inserting at least one rib of first and second support beams into the aligned grooves of the respective sides of the first and second blocks and seating them securely. A second column comprising similarly configured third and a fourth blocks may now be constructed. The operation is much the same, except now the third block is positioned so that one of its sides is adjacent to one of the sides of the first block and its groove engages at least one other rib of one of the already positioned support beams. The fourth block is then positioned on top of the third block in a similar manner. That is, the fourth block is positioned so that one of its sides is adjacent to one of the sides of the second block and its groove engages at least one other rib of one of the already positioned support beam. After the second column is erected, the third and fourth blocks would be operatively connected to each other along their respective free side by inserting at least one rib of a third support beam into their aligned vertical groove of the respective sides of the first and second blocks and seating them securely. And so on.
Another preferred method of constructing a wall structure according to the present invention would be as follows. A person would prepare or otherwise select an appropriate substructure on which to construct a wall structure. The construction would begin by operatively connecting a first elongated support beam to the substructure in a vertical orientation. Then using the first support beam as a reference, a series of support beams would be operatively connected to the substructure, with all of the support beams in vertical and collateral alignment, and with the distance between adjacent support beams sufficient to enable the ribs of adjacent beams to engage opposing side grooves of a block. Once the dimensions of the wall structure have been established, the blocks with opposing side grooves may be laid by sliding the blocks in a vertical motion along the length of and between adjacent support beams. This may be done course by course, column by column, or in a mixture of both columns and courses, as desired.
In a variation of the aforementioned methods, the construction would begin by operatively connecting a first elongated support beam to the substructure in a vertical orientation. Then a first block having opposing side grooves would be placed in a desired position and orientation against the first elongate support beam so that at least one of the ribs of the first beam is seated within one of the side grooves of the block. Then, a second, similar block would be placed directly on top of the first block so that the at least one rib of the first beam is also seated within one of the side grooves of the second block so that the opposing side grooves of the first and second blocks are in vertical alignment with each other and the first and second blocks form a column. Next, the first and second blocks are operatively connected to each other along their other respective sides by aligning the grooves of the respective sides of the first and second blocks, and inserting at least one rib of a second support beam into the aligned grooves and seating it securely therein. After the second support beam is seated, it is attached to the substructure. A second column comprising similarly configured third and a fourth blocks may now be constructed. The operation is the same, with the third block positioned so that one of its sides is adjacent to one of the sides of the first block and its groove engages another rib of the already positioned second support beam. The fourth block is then positioned on top of the third block in a similar manner. That is, the fourth block is positioned so that one of its sides is adjacent to one of the sides of the second block and its groove engages another rib of the already positioned second support beam. After the second column is erected, the third and fourth blocks would be operatively connected to each other along their respective free side by aligning the grooves of the respective sides of the third and fourth blocks, and inserting at least one rib of a third support beam into the aligned grooves and seating it securely therein. After the third support beam is seated, it is attached to the substructure. And so on.
The foregoing is considered as illustrative only of the principles of the invention. Furthermore, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described. While the preferred embodiment has been described, the details may be changed without departing from the invention, which is defined by the claims.
Number | Date | Country | Kind |
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PCT/US00/25791 | Sep 2000 | WO | international |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/US01/11957 | 4/12/2001 | WO | 00 | 2/28/2003 |
Publishing Document | Publishing Date | Country | Kind |
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WO01/79620 | 10/25/2001 | WO | A |
Number | Name | Date | Kind |
---|---|---|---|
1509424 | Garrard | Sep 1924 | A |
1548214 | Schaefer et al. | Aug 1925 | A |
1592476 | Torrecelli | Jul 1926 | A |
2066205 | Keating | Dec 1936 | A |
2158732 | Shannon | May 1939 | A |
2162695 | Boyd | Jun 1939 | A |
2392551 | Roe | Jan 1946 | A |
2703004 | Kenedy | Mar 1955 | A |
2787812 | Long | Apr 1957 | A |
3114220 | Maddox et al. | Dec 1963 | A |
3381437 | Kidney | May 1968 | A |
3412515 | Finon | Nov 1968 | A |
3427771 | Cacossa | Feb 1969 | A |
3608928 | Hooker | Sep 1971 | A |
3859765 | Nelsson | Jan 1975 | A |
3888055 | Gallo | Jun 1975 | A |
4057947 | Oide | Nov 1977 | A |
4214412 | Barylski | Jul 1980 | A |
4408427 | Zilch | Oct 1983 | A |
4443991 | Mieyal | Apr 1984 | A |
4549378 | Ayers et al. | Oct 1985 | A |
4641469 | Wood | Feb 1987 | A |
4656797 | Marquart | Apr 1987 | A |
4674593 | McCarty | Jun 1987 | A |
4738061 | Herndon | Apr 1988 | A |
5098328 | Beerens | Mar 1992 | A |
5291711 | Kopaz | Mar 1994 | A |
5337530 | Beames | Aug 1994 | A |
5363620 | Liu | Nov 1994 | A |
5501050 | Ruel | Mar 1996 | A |
5688078 | Hammer | Nov 1997 | A |
5704180 | Boeck | Jan 1998 | A |
5775046 | Fanger et al. | Jul 1998 | A |
5787669 | Bishop | Aug 1998 | A |
5984044 | Christensen | Nov 1999 | A |
6125597 | Hoffman et al. | Oct 2000 | A |
6170214 | Treister et al. | Jan 2001 | B1 |
6318041 | Stanley | Nov 2001 | B1 |
6374552 | Price | Apr 2002 | B1 |
6675545 | Chen et al. | Jan 2004 | B2 |
6695544 | Knudson et al. | Feb 2004 | B2 |
6986934 | Chen et al. | Jan 2006 | B2 |
20020026760 | Moore | Mar 2002 | A1 |
Number | Date | Country |
---|---|---|
2264728 | Sep 1993 | GB |
40-6158814 | Jun 1994 | JP |
WO 0179620 | Oct 2001 | WO |
Number | Date | Country | |
---|---|---|---|
20040006945 A1 | Jan 2004 | US |