Paper management system

Information

  • Patent Grant
  • 6170791
  • Patent Number
    6,170,791
  • Date Filed
    Wednesday, December 23, 1998
    26 years ago
  • Date Issued
    Tuesday, January 9, 2001
    24 years ago
Abstract
The system includes multiple components that may be used individually, or in conjunction with other components of the system, including a copy holder, paper organizer and a monitor-mounted copy holder. The copy holder/stand accommodates a variety of paper sizes in either portrait or landscape orientation. The copy stand includes a base stand and a removable copy holder, thus allowing the copy holder to be used as a clip board. The copy holder is rotatable about the base stand, thus allowing variation of the relative angle between the user and the copy holder. The copy holder includes at least one clip, and preferably at least two different types of clips. The clips may hold papers and documents against the copy holder as well as provide a means of highlighting or marking regions of particular interest on a document page. The paper organizer may either stand-alone or be held within an opening in the base stand of the copy holder. The paper organizer includes a plurality of curved document support members, the combination of curvature and support member spacing insuring that the documents within the organizer remain in an upright position. The monitor mounted copy holder includes a clip, thus capable of holding a document to the holder. Additionally, the monitor mounted copy holder includes a cavity designed to accommodate a small notepad.
Description




FIELD OF THE INVENTION




The present invention relates in general to a paper management system, and in particular, to a system for holding papers of varying size in a convenient manner about a desk.




BACKGROUND OF THE INVENTION




A variety of different types of paper holders have been designed over time. Typically these holders are designed to fit a specific need of the targeted user. For example, a variety of holders have been designed to hold papers in a substantially vertical fashion near a computer or typewriter, thereby allowing the user access to the information on the papers while freeing up both hands for typing. A second variety of paper holders have been designed to hold papers in an orderly fashion on a desk. A third variety of paper holders have been designed to hold personal note cards of varying size, such as Post-it™ notes.




In the first type of paper holder, often referred to as a copy stand, a flat surface is coupled to a base unit. Typically the base unit or stand is designed to rest on a flat surface, e.g., a desk surface, while providing a means of adjusting the angle of the flat surface with respect to the user. The flat surface may include a tray along the bottom edge, thus preventing papers from sliding off of the surface. The tray can also be used to allow multiple papers to be stacked. The flat surface may include some form of clip attached to the surface, thus providing a means of clipping papers to the surface. The flat surface may also include a ruler slideably attached along one side, the ruler providing a means for the user to mark or highlight an area of interest on the paper.




In the second type of paper holder, often referred to as a paper tray, one or more trays are provided for holding papers in an orderly fashion, for example on a user's desk. Each tray is typically designed for stacking papers, thus including three sides to hold the papers in place, with a lower forward facing side. The lower side allows the user easy access to the contents of the tray. Often each tray includes a means of fixing the tray to an additional tray in a stacking fashion, thus providing the user a means of segregating different types of papers by placing the papers in different trays.




In the third type of paper holder, personal notes or notepads are held in place. For example, one type of holder designed to be placed on a desk is weighted and includes non-slip feet. Once a notepad is attached to the writing surface of the holder, for example with the use of an adhesive, a user can write a note without the pad slipping. In an alternate configuration, a notepad holder is designed to be mounted within a car, thus providing the user with an easy writing surface to jot down notes while driving or while using a mobile/cellular phone. This type of notepad holder typically uses a suction cup to mount to the inside surface of the windshield.




From the foregoing, it is apparent that what is needed is a compact, multifunctional paper holding system. The present invention provides such a system.




SUMMARY OF THE INVENTION




The present invention provides a paper management system for use in a typical office environment. The system includes multiple components that can be used individually, or in conjunction with other components of the system.




In one aspect of the invention, a copy stand is provided that is designed to accommodate a variety of paper sizes. The copy stand includes a base stand and a copy holder. The copy holder can be removed from the base stand, thus allowing it to be used independently as a clip board. The copy holder can be attached to the base stand along either of at least two edges, allowing the copy holder to be used in either a portrait or a landscape configuration. When attached, the copy holder can be rotated about the base stand, thus allowing the relative angle between the user and the copy holder to be varied.




In another aspect of the invention, the copy holder includes at least one clip, and preferably at least two different types of clips. The clips are used to hold papers and documents against the copy holder as well as provide a means of highlighting or marking regions of particular interest on a document page. The clips can be mounted to any edge of the copy holder and, through the use of a series of guides, easily repositioned along a given edge.




In yet another aspect of the invention, a paper organizer is provided. The paper organizer is designed to fit within an opening in the base stand of the copy holder. The organizer can either be used in a stand-alone mode or while it is held within the base stand, assuming that the copy holder is not attached to the base stand and that the copy holder support is retracted (i.e., fully rotated backwards). The paper organizer includes a plurality of curved document support members, the combination of curvature and support member spacing insuring that the documents within the organizer remain in an upright position. Additionally, due to the incline of the upper surface of the organizer base, the upper edges of the documents held within the organizer are at varying heights, thus allowing the documents to be easily identified and withdrawn from the organizer.




In yet another aspect of the invention, a copy holder is provided that can be attached to either upper corner of a computer monitor. The copy holder is attached to the monitor via a combination of a mounting bracket and a support member which allows the position of the copy holder relative to the monitor to be varied. The copy holder includes a clip, thus providing a means of holding a document to the holder. Additionally, the copy holder includes a cavity designed to accommodate a small notepad.




A further understanding of the nature and advantages of the present invention may be realized by reference to the remaining portions of the specification and the drawings.











BRIEF DESCRIPTION OF THE DRAWINGS





FIG. 1

is an illustration of the front surface of the flat portion of a copy stand according to present invention;





FIG. 2

is a cross-sectional view of a clip for use with the present invention;





FIG. 3

is a cross-sectional view of an alternate clip embodiment;





FIG. 4

is a perspective view of the copy stand base according to the present invention in which the stand support member is fully rotated backwards;





FIG. 5

is a perspective view of the copy stand base shown in

FIG. 4

with the stand support member fully rotated forwards;





FIG. 6

is an illustration of the back surface of the flat portion of the copy stand shown in

FIG. 1

;





FIG. 7

is a top view illustration of a flat portion hinge member according to the invention;





FIG. 8

is a cross-section of the hinge member shown in

FIG. 7

along a plane A—A;





FIG. 9

is a cross-section of the hinge member shown in

FIG. 7

along a plane B—B;





FIG. 10

is a top view illustration of a base portion hinge member according to the invention;





FIG. 11

is a cross-section of the hinge member shown in

FIG. 10

along a plane C—C;





FIG. 12

is a cross-section of the hinge member shown in

FIG. 10

along a plane D—D;





FIG. 13

is a perspective view of a paper organizer according to the invention;





FIG. 14

is a top illustration of the paper organizer shown in

FIG. 13

;





FIG. 15

is an illustration of a copy stand mounted to a computer monitor in accordance with the present invention;





FIG. 16

is an exploded reverse view of the copy stand shown in

FIG. 15

; and





FIG. 17

is a cross-section of the copy holder shown in

FIG. 15

along a plane E—E.











DESCRIPTION OF THE SPECIFIC EMBODIMENTS




The present invention provides a paper management system for use in a typical office environment. The system includes multiple components that can be used individually, or in conjunction with other components of the system.




In one aspect of the invention, a copy stand is provided. The copy stand includes a base portion and a removable flat surface portion. A preferred embodiment of the front surface of a removable flat portion


100


is shown in FIG.


1


. Although portion


100


can be made of a variety of materials, preferably it is fabricated from either a thermoplastic or a thermosetting plastic. The size of removable flat portion


100


is large enough to allow a variety of paper sizes to be easily accommodated, including metric sized paper (e.g., A


4


). Although portion


100


is designed to be coupled to a base stand portion, it may also be used as a separate clipboard. As a clipboard, portion


100


provides the user with a firm and flat surface


101


to write on. In order to provide the user with a comfortable grip, the perimeter of portion


100


preferably includes a slightly curved edge


103


. Edge


103


preferably includes a pair of inwardly curved portions


105


that provide a convenient and comfortable location for carrying and holding portion


100


when it is in use as a clipboard.




Removable flat portion


100


includes one or more clips


107


that are used to hold papers against flat surface


101


. Clips


107


can be attached to any of the four edges of portion


100


. Each clip


107


is slideably mounted to portion


100


, thus allowing the user to alter the position of the clip along the edge of portion


100


in order to accommodate papers of varying size and/or shape. To operate clip


107


, the user presses along an edge portion


109


of the clip, thereby causing a portion


111


of the clip to be sufficiently elevated from flat surface


101


to permit papers to be slid between end portion


111


and flat surface


101


.




Clip


107


also includes at least one slot


113


, and preferably contains a pair of slots


113


located on either side of the clip. Slots


113


can be used to hold one or more pages of a document away from surface


101


, thus allowing the user to see the underlying pages. For example, a user may wish to flip back and forth between two pages clipped to surface


101


. To view the second page the user need only fold back the first page, slipping a portion of the first page into slot


113


. The wedge shape of slot


113


keeps the page portion in place. To further enhance the holding ability of slot


113


, an upper clip wing


115


can be formed at a slight angle with respect to a lower clip wing


117


. In other words, clip wings


115


and


117


are preferably not formed in a single plane.




Flat portion


100


preferably also includes at least one ruler clip


119


. As with clip


107


, clip


119


can be slideably mounted to any of the four edges of portion


100


. Furthermore, clip


119


can also be used to hold one or more document pages against surface


101


. Unlike clip


107


, however, clip


119


includes a ruler portion


121


that rests across at least a major portion of surface


101


. Ruler portion


121


is preferably clear with graduated markings. If clip


119


is located such that ruler portion


121


extends along the long axis of surface


101


(e.g., clip


119


placed in the location of clip


107


in FIG.


1


), ruler


121


can be replaced with a similar but longer ruler, thus extending the fall width of surface


101


.




As shown in

FIG. 1

, surface


101


includes a groove


123


. Groove


123


can be used in conjunction with either clips


107


or


119


to provide a better clip tracking system.





FIGS. 2 and 3

are cross-sectional views of clips


107


and


119


, respectively. As shown, flat surface


101


includes three segments


201


-


203


that extend from the back surface. Segments


201


and


202


create a channel into which a portion


205


of either clip


107


or clip


119


extends. Additionally, segments


201


and


202


add rigidity to flat surface


101


without adding substantial weight. Either clip also includes a portion


207


that extends over the front surface of


101


and, in conjunction with back clip portions


205


and


209


, provides a means of holding the clip in place. As shown in

FIG. 2

, portion


207


may only extend a small distance along surface


101


. Alternately, as shown in

FIG. 3

, portion


207


may have sufficient length to include a portion


301


that operates cooperatively with groove


123


to provide an improved clip tracking system. Segment


203


of surface


101


extends substantially between portions


207


and


209


of the clip, thereby providing additional clip stability.




Both clips


107


and


119


include a spring


213


which provides sufficient tension on the clip to hold papers between clip portion


111


and flat surface


101


. Preferably spring


213


is formed simultaneously with the clip and using the same material, thus minimizing cost and labor. Other forms of spring tensioners such as those of common use in the industry can also be used.

FIG. 2

illustrates one configuration of a clip in which back portion


209


extends upward, creating a surface


215


that is complimentary to clip portion


109


. Thus a user can easily compress spring


213


in order to lift clip end portion


111


away from surface


101


, thereby allowing one or more pages to be captured by the clip. As shown, clip end portion


111


also includes a small extension


217


. Extension


217


increases the force on a very limited area of the captured document, creating an improved holding clip.

FIG. 3

illustrates an alternate clip configuration in which clip back portion


209


does not extend substantially beyond spring


213


. Although this configuration makes it more difficult to apply a lot of force to spring


213


, it is adequate for some applications. For example, this configuration is preferred for use with ruler mounting clip


119


since the intent of this clip spring is to simply keep ruler


121


in place, not to exert a lot of pressure on the document being held onto surface


101


.





FIGS. 4 and 5

are perspective views of the copy stand portion


400


according to the invention. Preferably stand


400


is comprised of two members, a base member


401


and a stand support member


403


, both preferably fabricated from either a thermoplastic or a thermosetting plastic. Stand support member


403


is rotatably attached to base


401


, thereby allowing stand member


403


to be placed in a range of positions. Stand support member


403


is shown in two different positions in

FIGS. 4 and 5

. In

FIG. 4

member


403


is fully rotated backwards while in

FIG. 5

member


403


is shown fully rotated forwards.




Base


401


is comprised of two portions, a front portion


405


and a rear portion


407


. A central region


409


is preferably left open, thus providing a storage space for another element of the present invention described fully below. Support member


403


is attached to rear portion


407


. Removable flat portion


100


, i.e., the copy stand, is hingeably attached to front base portion


405


through the use of at least one hinge means


409


and preferably through the use of three hinge means


409


as illustrated. When flat portion


100


is attached to base portion


400


via hinge means


409


, support stand tips


411


contact a ledge on the backside of flat portion


100


, thereby providing stand support. The angle of stand portion


100


relative to base portion


400


is determined by rotating support member


403


, causing stand tips


411


to contact a different ledge on the backside of portion


100


. Preferably a pair of side extensions


413


on support member


403


provide an easy gripping surface when the user adjusts the position of member


403


.




As noted above, portion


100


preferably includes at least one clip


107


that is used to hold papers against surface


101


. Alternately, when portion


100


is attached to base


400


, the user can choose not to use clip


107


, simply allowing the papers to rest on a ledge created by base portion


405


and an upwardly turned base lip


415


.





FIG. 6

is an illustration of a back surface


601


of flat portion


100


. This figure shows segments or ribs


201


and


202


extending from back surface


601


as well as surface edge


203


, the combination of all three providing guides for clips


107


and


119


as described above. Preferably segment


201


is a continuous segment that includes four corner segments


603


. In this embodiment of the invention, the distance that corner segments


603


extend away from back surface


601


is greater than the distance that the remaining portions of segment


201


extend from surface


601


. Due to the height of corner segments


603


, flat portion


100


lies flat on a surface such as a desk. Furthermore, the contour of segment


201


allows portion


100


to fit comfortably on the user's lap when portion


100


is used as a stand-alone clipboard.




Portion


100


includes hinge members


605


on at least two sides, preferably along a long side and a short side of portion


100


as shown. Hinge members


605


are removably coupleable with base portion hinge members


409


. Extending out from back surface


601


are two sets of ledge segments


607


and


609


. Although as shown each set (i.e.,


607


and


609


) includes six pairs of segments, different segment spacing as well as either more or less segments can also be used. In use, when a set of hinge members


605


is coupled to base portion hinge members


409


, support tips


411


intersect and provide support to a pair of ledge segments (i.e., from either set). Thus if the copy stand is used in a portrait mode a pair of segments


609


are used while if the copy stand is used in a landscape mode a pair of segments


607


are used. It should be understood that the design of the copy stand of the present invention allows it to be generally positioned between the user's monitor and the user's keyboard when it is used in the landscape mode and preferably when it is used in either the landscape mode or the portrait mode. By positioning the copy stand in this manner, the user is not required to look to either side of the monitor in order to see the document held on the stand.




FIGS.


7


-


9


and


10


-


12


are detailed illustrations of hinge members


605


and


409


, respectively.

FIG. 7

is a top view illustration of hinge member


605


.

FIG. 8

is a cross-section of hinge member


605


along a plane A—A.

FIG. 9

is a cross-section of hinge member


605


along a plane B—B. Both

FIGS. 8 and 9

illustrate in phantom a rod-like portion


1001


of hinge member


409


. As shown, rod-like portion


1001


is moving in a direction


801


, thus indicating that hinge members


409


and


605


are in the process of being coupled.





FIG. 10

is a top view illustration of hinge member


409


.

FIG. 11

is a cross-section of hinge member


409


along a plane C—C.

FIG. 12

is a cross-section of hinge member


409


along a plane D—D. During hinge member coupling, the members must be brought together in a direction


801


. Once the hinge members are coupled, a pair of shoulders


1003


of member


409


coincide with a pair of shoulders


701


of member


609


. As the two hinge members are rotated with respect to one another, for example during copy stand angle adjustment, shoulder members


701


and


1003


prevent flat portion


100


from accidentally separating from base portion


400


.





FIGS. 13 and 14

provide a perspective view and a top view, respectively, of a paper organizer


1300


according to the invention. Preferably paper organizer


1300


is fabricated from a single piece of either a thermoplastic or a thermosetting plastic. Alternately, organizer


1300


can be fabricated from other materials and/or utilize a multi-component design. For example, organizer


1300


can include a base structure


1301


, such as a non-slip rubber base, thereby preventing organizer


1300


from slipping around the user's desk.




Organizer


1300


is comprised of a base


1303


and a plurality of curved support members


1305


. The footprint of base


1303


preferably matches central region


410


in copy stand base


400


, thereby allowing organizer


1300


to fit within copy stand base


400


. Due to the complementary size of these two components, during storage or non-use organizer


1300


can be placed within base


400


, thus minimizing the amount of lost desk space. Additionally, organizer


1300


can be used while it is in this location, provided that flat portion


100


is not coupled to base


400


and that support structure


403


is rotated backwards into a position such as that shown in FIG.


4


.




As shown, organizer


1300


includes six document support members


1305


. It is to be understood that organizer


1300


can include either fewer or greater numbers of support members. Documents, either single page documents or multiple page documents, fit within spacing


1401


between support members


1305


. Due to the relatively narrow spacing between members


1305


as well as the slight curvature of the members, documents placed between the members remain in an upright position. Additionally, since the top surface of organizer base


1303


is sloped, the top edges of the documents held within successive pairs of members


1305


are at varying heights (i.e., staggered) with documents of the lowest height being closest to the front edge of organizer


1300


. Thus a user is able to not only identify which member pairs hold a document, but also easily withdraw a document from the organizer.





FIGS. 15 through 17

illustrate a copy stand


1500


according to another aspect of the invention. Copy stand


1500


is preferably comprised of four components; a mounting bracket


1501


, a support member


1503


, a copy holder


1505


, and a copy clip


1507


. Although each component of copy stand


1500


can be made from a variety of materials, preferably each component is fabricated from either a thermoplastic or a thermosetting plastic. Mounting bracket


1501


is used to attach copy stand


1500


to a location raised off of the desk surface. Preferably mounting bracket


1501


is attached to either the upper right (as shown) or upper left corner of a computer monitor


1509


, shown in phantom in FIG.


15


. Bracket


1501


can be mounted via hook and loop material, adhesives, or other means to monitor


1509


.





FIG. 16

is an exploded reverse view of copy stand


1500


. As shown, support member


1503


is rotatably attached to both bracket


1501


and copy holder


1505


, thus allowing the position of the copy holder to be varied. Variable position allows the user to place the copy holder in an optimum viewing position during use and swing the copy holder away during non-use. In order to achieve rotatability, support member


1503


fits over a mounting bracket spindle


1601


. Similarly, a spindle


1603


on the back surface of copy holder


1505


fits within a hole


1605


in support member


1503


.




Clip


1507


is similar to clip


107


illustrated in

FIGS. 1 and 6

and is used to hold papers to copy holder


1505


. Preferably clips


1507


and


107


are identical and interchangeable. As with clip


107


, a pair of ledges


1607


extending from the back surface of copy holder


1505


provide a guide to clip


1507


and prevent clip


1507


from unintentionally dropping off.




Included within copy holder


1505


is a cavity


1511


. The size of cavity


1511


is selected to accommodate a specific size personal notepad (e.g., Post-it™ notes). Preferably the size of cavity


1511


is selected to accommodate 3 inch by 3 inch notepads. A pair of extensions


1513


extending from either side of cavity


1511


insures that a notepad


1701


, shown in phantom in

FIG. 17

, is held in place within the cavity. A pair of depressions


1515


at the top and the bottom of cavity


1511


is designed to accommodate a user's fingers, providing easy access to notepad


1701


.




As will be understood by those familiar with the art, the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. Accordingly, the disclosures and descriptions herein are intended to be illustrative, but not limiting, of the scope of the invention which is set forth in the following claims.



Claims
  • 1. A paper management system, comprising:a base stand, wherein said base stand includes a first hinge portion; a support bracket rotatably attached to said base stand, wherein said support bracket includes a bracket tip; a copy stand, wherein said copy stand includes a second hinge portion along a first edge and a third hinge portion along a second edge, wherein said first hinge portion and said second hinge portion are removably coupleable and wherein said first hinge portion and said third hinge portion are removably coupleable, wherein a back surface of said copy stand includes a plurality of planar surface protrusions extending from said back surface, wherein at least one of said plurality of planar surface protrusions is aligned with said bracket tip when said first hinge portion and said second hinge portion are coupled, and wherein at least one of said plurality of planar surface protrusions is aligned with said bracket tip when said first hinge portion and said third hinge portion are coupled; and a first clip removably coupleable to said copy stand.
  • 2. The paper management system of claim 1, wherein said base stand includes three first hinge portions, and wherein said copy stand includes three second hinge portions along said first edge and three third hinge portions along said second edge.
  • 3. The paper management system of claim 1, wherein said support bracket includes two bracket tips.
  • 4. The paper management system of claim 1, wherein said first hinge portion and said second hinge portion are only coupleable when said first hinge portion and said second hinge portion are aligned substantially along a first plane, and wherein said first hinge portion and said third hinge portion are only coupleable when said first hinge portion and said third hinge portion are aligned substantially along said first plane.
  • 5. The paper management system of claim 1, wherein an edge of said back of said copy stand includes a channel defined between a set of guide rails and wherein a back portion of said first clip is interposed between said set of guide rails.
  • 6. The paper management system of claim 1, said first clip further comprising a front clip portion coupled to a back clip portion, wherein said front clip portion includes at least one slot, said slot capable of holding a document page folded away from a front surface of said copy stand.
  • 7. The paper management system of claim 1, further comprising a second clip removably coupleable to said copy stand, wherein said second clip includes an elongated portion extending substantially across said copy stand.
  • 8. The paper management system of claim 7, wherein said elongated portion includes graduated markings.
  • 9. The paper management system of claim 1, wherein said back surface of said copy stand includes a plurality of elevated portions, said elevated portions extending away from said back surface further than any other back surface feature providing a level plane on which said copy stand can rest.
  • 10. The paper management system of claim 1, said back surface of said copy stand further comprising a continuous planar member extending away from said back surface around a periphery of said back surface, said continuous planar member adding rigidity to said copy stand.
  • 11. The paper management system of claim 10, wherein said continuous planar member is contoured to extend variable distances from said back surface at various points around said periphery.
  • 12. The paper management system of claim 11, wherein said planar member includes a corner corresponding to each corner of said copy stand and wherein each corner of said contoured continuous planar member extends outwardly from said back surface sufficiently to provide a level resting plane when said back surface of said copy stand is disposed on a leveled surface.
  • 13. The paper management system of claim 1, further comprising a paper holder, wherein said paper holder includes a housing having a base portion and said housing having a top surface defining a plurality of document separators, wherein said base portion fits within an opening in said base stand, and wherein adjacent surfaces of said plurality of document separators are cooperatively curved.
  • 14. The paper management system of claim 13, wherein a document interposed between a pair of said adjacent surfaces is held upright due to a spacing between said pair of adjacent surfaces and said curvature of said adjacent surfaces.
  • 15. The paper management system of claim 13, wherein said base portion of said paper holder is inclined.
  • 16. The paper management system of claim 13, wherein said plurality of document separators includes at least six document separators.
  • 17. A paper management system, comprising:an attachment bracket; a support bracket rotatably attached to said attachment bracket; a copy stand rotatably attached to said support bracket, wherein a front surface of said copy stand includes a cavity of suitable size to fit a notepad; and a clip removably coupleable to said copy stand, said clip further comprising a front clip portion coupled to a back clip portion, wherein said front clip portion includes at least one slot, said slot capable of holding a document page folded away from the front surface of said copy stand.
  • 18. A paper management system, comprising:an attachment bracket; a support bracket rotatably attached to said attachment bracket; a copy stand rotatably attached to said support bracket, wherein a front surface of said copy stand includes a cavity of suitable size to fit a notepad; and a clip removably coupleable to said copy stand, wherein said front surface of said copy stand further comprises a pair of depressions extending into said cavity from opposing cavity sides.
US Referenced Citations (21)
Number Name Date Kind
D. 167203 Grode Jul 1952
D. 246491 D'Alo Nov 1977
D. 300095 Robinson Mar 1989
500715 Leslie Jul 1893
1060795 Smith May 1913
2348414 Pierce May 1944
2785901 McLemore Mar 1957
2873859 Gates Feb 1959
4125243 Liptak Nov 1978
4466593 Odenath Aug 1984
4501438 McKee Feb 1985
4518140 Ferranto May 1985
4531642 Racich Jul 1985
4987690 Aaldenberg et al. Jan 1991
5044593 Jones Sep 1991
5289926 Lewis et al. Mar 1994
5324076 Nieradka Jun 1994
5464293 Hall Nov 1995
5620162 Beckwith et al. Apr 1997
5746410 Hung May 1998
5897934 Yeh Apr 1999
Foreign Referenced Citations (1)
Number Date Country
WO 9740483 Oct 1997 WO