Patent Grant
11510449
The present disclosure relates to a cap including a rotatable visor, and more particularly, to a cap in which a visor smoothly rotates when a position of the visor is laterally changed.
Generally, a cap includes a crown which is a cover surrounding a head and a sun-screening visor sewn into a bottom part of the crown.
Also, caps are generally used to prevent a face from being exposed to sunlight during outdoor activities or exercises. A user who wears a cap generally shades his or her face from sunlight using a method of changing a direction of a visor by adjusting the cap when a direction of sunlight changes.
However, since it is very inconvenient to continuously adjust the cap according to the direction of sunlight, many visor-rotatable caps have been provided to shade the user from sunlight by only turning a visor left or rightward without adjusting the cap. Such conventional techniques have been disclosed in Korean Utility Model Registration No. 0390299, Korean Patent Publication No. 2000-0037084, and the like.
Caps disclosed by the conventional techniques are configured so that connection portions of a crown and a visor are formed as a sliding protrusion and a sliding groove, respectively, so that the crown and the visor are relatively rotatable along the connection portions. However, since the sliding protrusion and the sliding groove come into direct contact with each other, when the visor is rotated, frictional resistance occurs and rotation is not smoothly performed.
Meanwhile, a head circumference of human is not a completely circular shape and is generally an elliptical shape having a long length from a forehead to an occipital region and a short length between temporal regions. That is, curvatures of the circumference at the forehead, the temporal regions, and the occipital region differ from one another.
Accordingly, when caps of the above conventional techniques are worn, a bottom edge of a crown thereof changes to an elliptical shape according to a head shape such that rotation is not smoothly performed at parts at which curvatures among a forehead, temporal regions, and an occipital region are changed when a visor is rotated.
The present inventive concept is directed to providing a coupling portion structure that enables relative rotation between a visor and a crown, which is improved to minimize frictional resistance when the visor rotates.
The present inventive concept is also directed to providing a visor structure that enables a visor to smoothly rotate regardless of a head shape of a person wearing a cap.
One aspect of the present inventive concept provides a cap with a position-variable visor. The cap includes a crown including a guiding portion on an edge of a bottom end and a visor including a sliding portion coupled to the guiding portion.
The guiding portion may include a guiding surface formed to extend outward from the cap and a guiding rail formed by increasing a thickness of an end of the guiding surface, and the sliding portion may include a slider and a slider housing into which the slider is inserted.
In the slider, a rotating body accommodation hole may be formed in a slider body and a rotating body may be inserted into the rotating body accommodation hole to be freely rotatable while a part of the inserted rotating body is exposed toward the guiding rail.
The slider housing may be divided into an upper housing body and a lower housing body with a path therebetween through which the guiding surface and the guiding rail pass laterally.
The upper housing body may be located above the path and may include an upper separation-preventing step by which an upper part of the guiding rail is held, and the lower housing body may be located below the path and may include a slider accommodation portion into which the slider is inserted.
A leaf spring accommodation portion may be formed in the slider body below the rotating body accommodation hole.
The leaf spring accommodation portion may accommodate a leaf-spring portion. An elastic piece including a rotating body mounting portion may be formed on the leaf-spring portion. Also, a lower part of the rotating body inserted in the rotating body accommodation hole may be configured to be mounted in the rotating body mounting portion.
A protruding step may be formed on a top surface of the slider body so that the guiding rail is held by the protruding step not to be separated therefrom, and the lower housing body located below the path may include a lower separation-preventing step by which a lower part of the guiding rail is held.
A coupling protruding portion protruding outward may be formed on an outer surface of the slider body. A slider coupling groove may be formed in an inner sidewall of the slider housing. Also, the coupling protruding portion may be inserted into the slider coupling groove so that the slider is coupled to the slider housing.
The visor of the cap with the position-variable visor may include a main visor having one end on which the sliding portion is formed and an auxiliary visor having one corner part coupled to the main visor to be freely rotatable and another corner part coupled to the guiding portion to be freely movable.
The auxiliary visor may be formed by vertically coupling an upper auxiliary visor located on a top surface of the main visor to a lower auxiliary visor located on a bottom surface of the main visor, and an insertion gap into which a part of the main visor is inserted may be formed between the upper auxiliary visor and the lower auxiliary visor which are coupled to each other.
The main visor may include a coupling hole formed therein. The auxiliary visor may include a fastening hole formed in any one of the upper auxiliary visor and the lower auxiliary visor and a fastening protrusion formed in another one of the upper auxiliary visor and the lower auxiliary visor at a position corresponding to the fastening hole. Also, the fastening protrusion may pass through the coupling hole of the main visor inserted into the insertion gap and may be fastened to the fastening hole so as to couple the auxiliary visor and the main visor.
The main visor may include a guiding hole having an elongated hole shape and configured to guide the auxiliary visor not to be separated from a course when the auxiliary visor moves relatively to the main visor, and the auxiliary visor may include an intermediate guiding protrusion inserted into the guiding hole to be formed inside the insertion gap.
The guiding portion may include a guiding surface formed to extend outward from the cap and a guiding rail formed by increasing a thickness of an end of the guiding surface, and the guiding portion and the auxiliary visor may be coupled by the guiding rail of the guiding portion being inserted into and then held by a guiding protrusion portion of the auxiliary visor.
Since rolling movement occurs, due to a rotating body, between a guiding portion of a crown and a sliding portion of a visor coupled to the guiding portion and rotated, frictional resistance is reduced so that rotation of the visor may be smoothly performed.
Also, according to the present inventive concept, since the sliding portion is formed by assembling a slider as a separate component to be inserted into and coupled to a slider housing, an unskilled worker may easily and quickly manufacture a product.
According to the present inventive concept, when the visor is rotated while a cap is worn, an auxiliary visor and a main visor relatively move so that rotation of the visor may be smoothly performed according to a change in curvature of a head circumference.
Hereinafter, embodiments of the present inventive concept will be described in detail with reference to the attached drawings. However, thicknesses of lines, sizes of components, and the like shown in the drawings may be exaggerated or reduced for convenience to allow a configuration of the present inventive concept to be more clearly understood.
Among the terms used for description of the present inventive concept, there are terms defined in consideration of functions thereof. However, since these terms may be expressed as different terms depending on an intention of a user or custom, they should be reasonably understood by considering content disclosed throughout the specification.
Also, directional terms such as “above,” “below,” “front,” “rear,” “left,” “right,” “front end,”, “frontward,” “rear end,” “rearward,” and the like are generally based on orientation in the drawing(s). However, since components of the embodiments of the present inventive concept may be set in position in a variety of orientations, the directional terms are used for example but do not limit the positions.
When it is disclosed that the components used herein are “connected,” “coupled,” “fastened,” or the like to each other, it should be understood that the components may be “connected,” “coupled,” “fastened,” or the like in an indirect method using an intermediate medium element.
Also, in the description of the present inventive concept, a detailed description of well-known functions and components which may be deemed to unnecessarily obscure the essential of the present inventive concept will be omitted.
An exterior which allows the whole components of the present inventive concept to be recognizable is shown in
Hereinafter, significant components and functions capable of varying relative positions of a visor and a crown of a cap according to an embodiment of the present inventive concept will be described first with reference to
As shown in
Accordingly, in the cap of the present inventive concept, the guiding portion 10 pressed against the head circumference is formed to have an elliptical shape in which a front-rear length L of the head is longer than a lateral width S thereof. The guiding portion 10 may be manufactured using a material such as a synthetic resin or the like having an elastic force so as to be deformable according to a head shape of a person who wears the cap. Although a human head generally has a front-rear length greater than a lateral width, there are differences between human races and persons.
The guiding portion 10 in the enlarged cross-sectional view is divided into a supporting edge 11 configured to surround the head circumference, a guiding surface 12 formed to extend outward from a bottom end of the supporting edge 11, and a guiding rail 13 formed by increasing a thickness of an end of the extending guiding surface 12 more than a thickness of the guiding surface. Here, sectional shapes of the guiding surface 12 and the guiding rail 13 are similar to that of a rail of railroad.
The supporting edge 11 is formed to have a band shape having a long length and a width of about 10 mm. The guiding surface 12 which extends laterally in an outward direction is formed on the bottom end of the supporting edge 11, and the head cover shown as the dotted line is attached to an upper part by sewing, bonding, or the like.
The guiding surface 12 is a surface where a rotating body 50 of a sliding portion 40, which will be described below, comes into contact therewith and rolls thereon.
In the embodiment of the present inventive concept, the guiding surface 12 is formed along a whole perimeter of the supporting edge 11 but may be formed on a part of the supporting edge 11 as necessary. A width of the guiding surface 12 may be formed to be about 5 mm.
The guiding rail 13 formed on the end of the guiding surface 12 functions so that the main visor 20 which will be described below is coupled to the sliding portion 40 and a guiding protrusion portion 34 of the auxiliary visor 30 to be freely movable so as to allow the visor 30 to be stably movable without being separated while rotating along the guiding portion 10.
In the embodiment of the present inventive concept, as shown in the enlarged cross-sectional view taken along line A-A of
As shown in
Subsequently, components of the sliding portion 40 according to the embodiment of the present inventive concept will be described in detail with reference to
The sliding portion 40 is largely divided into a slider housing 41 and a slider 60, and the slider 60 may be subdivided into a slider body 45, the rotating body 50, and a leaf-spring portion 51.
The slider housing 41 is integrated with the main visor 2 and is divided into an upper housing body 42 and a lower housing body 43 as shown in
The upper housing body 42 is a part located above the path P and shown on a top surface of the visor 2 when the cap is put on. An upper separation-preventing step 42-1 is formed on a rear end of the upper housing body 42 facing the crown 1 to protrude downward to be lengthwise laterally.
Accordingly, when the guiding rail 13 is inserted laterally into the path P, even when the visor 2 is pulled forward, an upper part of the guiding rail 13 is held by the upper separation-preventing step 42-1 and not easily separated.
The lower housing body 43 is a part located below the path P and shown on a bottom surface of the visor 2 when the cap is put on.
A slider accommodation portion 44 into which the slider 60 is inserted is formed on the lower housing body 43, and a lower separation-preventing step 43-1 by which a lower part of the guiding rail 13 is held is formed on the lower housing body 43 laterally above the slider accommodation portion 44.
The lower separation-preventing step 43-1 performs a function equal to that of the above-described upper separation-preventing step 42-1. That is, when the guiding rail 13 is inserted into the path P, even when the visor 2 is pulled forward, the lower part of the guiding rail 13 is held by the lower separation-preventing step 43-1 and not easily separated.
The slider accommodation portion 44 may be formed to have a shape corresponding to a shape of the slider 60, which is to be inserted thereinto, so as to insert the slider 60 thereinto.
The shape of the slider accommodation portion 44 according to the embodiment of the present inventive concept is a rectangular parallelepiped shape with an upper part opened toward the path P, and slider-coupling grooves 44-1 are further formed in the lower housing body 43 on left and right sides of a lower part thereof.
The shape of the slider accommodation portion 44 is formed according to the shape of the slider 60 according to the embodiment of the present inventive concept which will be described below. The shape of the slider accommodation portion may be changed when the shape of the slider is changed in a design.
As shown in
A rotating body accommodation hole 47 is formed in an upper part of the slider body 45, and a leaf spring portion accommodation space 49 capable of accommodating the leaf-spring portion 51 is formed inside the body below the rotating body accommodation hole 47.
Also, as shown in
When the protruding step 46 is configured to be collinearly located with the lower separation-preventing step 43-1 in the same shape while the slider body 45 is inserted into and coupled to the slider accommodation portion 44, lateral movement of the sliding portion 40 may be more smoothly performed along the guiding rail 13.
Accordingly, the protruding step 46 and the lower separation-preventing step 43-1 may be formed to have sectional shapes having the same size. Here, when the slider body 45 is inserted into and coupled to the slider accommodation portion 44, the protruding step 46 and the lower separation-preventing step 43-1 are formed as continuously-formed separation-preventing steps having the same shape and being collinearly located as shown in
Since both the protruding step 46 and the lower separation-preventing step 43-1 prevent the guiding rail 13 from being separated, any one will be selectively formed as necessary.
Also, as shown in
The rotating body 50 is accommodated in the rotating body accommodation hole 47 formed in the upper part of the slider body 45 and is placed so as to be freely rotatable in the rotating body accommodation hole.
In the embodiment of the present inventive concept, the rotating body 50 may be a spherical ball and the spherical ball may be replaced with a mechanical element such as a cylindrical roller which is freely rotatable leftward and rightward. The rotating body 50 is formed using a material such as steel or high-intensity plastic to have a smooth surface.
The rotating body accommodation hole 47 is to be opened toward the path P through which the guiding rail 13 passes. The rotating body accommodation hole 47 shown in
That is, a hole diameter of the rotating body accommodation hole 47 shown through the top surface of the slider body 45 shown in
Accordingly, like a perspective cross section of the sliding portion 40 shown in
The leaf spring portion accommodation space 49 formed in the body below the rotating body accommodation hole 47 is formed to have a shape corresponding to a shape of the leaf-spring portion 51.
Since the leaf-spring portion 51 according to the embodiment of the present inventive concept has a desk shape including legs on both sides, correspondingly, the leaf spring portion accommodation space 49 has a shape formed by digging into the inside of the slider body 45 in a rectangular parallelepiped shape.
Accordingly, slider body legs 48 are formed on both left and right sides of the leaf spring portion accommodation space 49, and leaf spring legs 54 may be installed to be pressed against insides of the slider body legs 48.
As shown in
Accordingly, elastic pieces 52 having a protruding part shape are naturally formed inside the punched holes 55, and both side surfaces of the leaf-spring portion 51 formed by bending become the leaf spring legs 54. Since one end of the elastic piece 52 becomes a fixed end, the elastic piece 52 may elastically move in a vertical direction on the basis of the fixed end.
A hole-shaped rotating body mounting portion 53 is formed at a central part of the elastic piece 52 so that the rotating body 50 may be located. Here, a hole diameter of the rotating body mounting portion 53 should be smaller than the diameter of the rotating body 50 to prevent the rotating body from being separated downward. A position of the rotating body mounting portion 53 is formed to coincide with a position of the rotating body accommodation hole 47 of the slider body 45.
Also, the rotating body mounting portion 53 is shown as a complete through-hole shape in
As shown in
In this state, when the guiding portion 10 is inserted into the path P and the visor is laterally rotated, rolling friction occurs between the rotating body 50 and the guiding surface 3 so that rotation of the visor is smoothly performed.
Meanwhile, the rotating body accommodation hole 47 formed in the upper part of the slider body 45 according the present inventive concept is formed in a groove shape opened toward the path P through which the guiding rail 13 passes so as to partially expose the upper part of the rotating body 50 accommodated therein toward the path P.
That is, the rotating body accommodation hole 47 does not have a hole shape passing through the slider body 45 but has a concave groove shape in the top surface of the slider body 45. Accordingly, the leaf spring portion accommodation space 49 and the leaf-spring portion 51 formed inside the slider body are not necessary.
In this case, although components of the slider 60 are simplified, since a great sliding-frictional force occurs between an inner surface of the groove and a surface of the rotating body 50 when the rotating body 50 rotates inside the rotating body accommodation hole having the concave groove shape, rotation is performed less smoothly.
Next, the visor 2 of the embodiment of the present inventive concept will be described with reference to
The visor 2 according to the embodiment of the present inventive concept includes the main visor 20 and the auxiliary visors 30 coupled to the main visor.
A central part of the main visor 20 includes the sliding portion 40 formed on one end, and left and right side parts become variable surfaces 21 to which the auxiliary visors 30 are coupled.
Since the variable surfaces 21 are formed to have a smaller thickness in comparison to that of the central part of the main visor 20 as shown in
A reason for forming the thickness of the variable surfaces 21 to be small is to provide better aesthetics by preventing an overall thickness from being excessively increased when the auxiliary visors 30 are coupled. Accordingly, as necessary, the variable surfaces 21 may be formed not to be thin. Here, the movement-restricting steps 22 may be omitted.
In the embodiment of the present inventive concept, the movement-restricting steps 22 are formed on a top surface of the main visor 20 but may be a bottom surface or top and bottom surfaces of the main visor 20 as necessary.
The auxiliary visors 30 are coupled to the variable surfaces 21 on left and right sides of the main visor 20. For the coupling, as shown in
The auxiliary visor 30 is divided into an upper auxiliary visor 31 located on the top surface of the main visor 20 and a lower auxiliary visor 32 located on a bottom surface of the main visor 20 when the auxiliary visor 30 is coupled to the main visor 20. When the upper auxiliary visor 31 and the lower auxiliary visor 32 are coupled, an insertion gap 33, into which the variable surface 21 of each of left and right sides of the main visor 20 is inserted to be movable back-and-forth, is formed therebetween.
The auxiliary visor 30 according to the embodiment of the present inventive concept is formed to have a shape similar to a triangle overall. A fastening hole 35 and a fastening protrusion 36 are formed at a corner part of the triangular shape, and the guiding protrusion portion 34 is formed on another corner part.
Also, when the auxiliary visor 30 is coupled to the main visor 20, the corner part at which the fastening hole 35 and the fastening protrusion 36 are formed is coupled to the coupling hole 23 of the main visor 20 to be freely rotatable and the other corner part on which the guiding protrusion portion 34 is formed is coupled to the guiding portion 10 to be freely movable.
In the embodiment of the present inventive concept, the fastening protrusion 36 is formed on one corner part toward the inner surface of the upper auxiliary visor 31, and the fastening hole 35 is formed in one corner part toward the inner surface of the lower auxiliary visor 32.
Accordingly, when the upper auxiliary visor 31 and the lower auxiliary visor 32 are coupled so that the inner surfaces thereof face each other, the fastening protrusion 36 passes through and is coupled to the fastening hole 35.
On the other hand, the fastening protrusion 36 and the fastening hole 35 may be installed at the lower auxiliary visor 32 and the upper auxiliary visor 31, respectively.
The fastening protrusion 36 according to the embodiment of the present inventive concept is formed by circularly arranging four protruding columns with holding steps outside end parts thereof. When the protruding columns pass through the fastening hole 35, the holding steps are held by an edge of the fastening hole to be fastened.
Accordingly, when the auxiliary visors 30 are coupled to the main visor 20, the fastening protrusions 36 sequentially pass through the coupling holes 23 of the main visor 20 inserted in the insertion gaps 33 and the fastening holes 35 to be fastened thereto.
Meanwhile, the fastening protrusions 36 may be formed to have a simple cylindrical shape without holding steps. In this case, the fastening hole 35 of the lower auxiliary visor 32 may be formed to have a groove shape which does not pass therethrough so that insertion fitting method using an auxiliary visor coupling protrusion 38-1 and an auxiliary visor coupling groove 39-1 may be performed.
As shown in
As shown in
Gap-forming steps 38 and 39 having certain heights are formed on parts of edges of inner surfaces of the upper auxiliary visor 31 and the lower auxiliary visor 32, respectively.
The gap-forming step 38 of the upper auxiliary visor 31 and the gap-forming step 39 of the lower auxiliary visor 32 are installed in positions facing each other. Accordingly, when the upper auxiliary visor 31 and the lower auxiliary visor 32 are coupled, a pair of such gap-forming steps 38 and 39 come into contact with each other and space inner surfaces of the upper auxiliary visor 31 and the lower auxiliary visor 32 to be at a certain height apart from each other. An interval formed as described above becomes the insertion gap 33 into which the variable surface 21 of the main visor 20 is inserted.
In the embodiment of the present inventive concept, a plurality of such auxiliary visor coupling protrusions 38-1 are installed on a periphery of the gap-forming step 38 of the upper auxiliary visor 31, and auxiliary visor coupling grooves 39-1 are installed in the lower auxiliary visor 32 at positions corresponding to those of the auxiliary visor coupling protrusions 38-1.
The auxiliary visor coupling protrusions 38-1 and the auxiliary visor coupling grooves 39-1 may be manufactured to have shapes which are insertion-fitted into each other.
It is necessary to install the auxiliary visor coupling protrusions 38-1, the auxiliary visor coupling grooves 39-1, and the gap-forming steps 38 and 39 in a place limited in not belonging to an area in which the auxiliary visors 30 and the variable surfaces 21 inserted thereinto move relatively.
As shown in
In the embodiment of the present inventive concept, the auxiliary visor coupling protrusions 38-1, the auxiliary visor coupling grooves 39-1, and the gap-forming steps 38 and 39 are installed along outer edges of the auxiliary visors 30 at positions limited to half an overall length from the guiding protrusion portions 34 to the outward edges. Due to a limitation in installation positions, as shown in
Meanwhile, as shown in
A configuration in which an overall shape of the visor 2 varies according to a curvature of the head circumference when the visor 2 according to the embodiment of the present inventive concept is rotated will be described with reference to
However, a distance between the auxiliary visor 30 and the movement-restricting step 22 varies according to a curvature formed by the guiding portion 10 between the sliding portion 40 and the guiding protrusion portion 34. That is, when the curvature of the guiding portion 10 is great, the distance decreases. When the curvature is small, the distance increases.
As shown in
Here, a curvature formed by the guiding portion 10 between the sliding portion 40 and the guiding protrusion portion 34 of the auxiliary visor on a right side is greater than a curvature formed by the guiding portion 10 between the sliding portion 40 and the guiding protrusion portion 34 of the auxiliary visor on a left side.
Accordingly, a distance d2 between the movement-restricting step 22 and an auxiliary visor side surface 37 of the auxiliary visor on the right side becomes smaller than a distance d1 between the movement-restricting step 22 and an auxiliary visor side surface 37 of the auxiliary visor on the left side.
Here, the intermediate guiding protrusion 34-3 of the left auxiliary visor 30 slightly moves from an end of the guiding hole 24 shown in
Here, curvatures formed by the sliding portion 40 and the guiding portion 10 between the auxiliary visor guiding protrusion portions 34 on both sides are equal. Also, the curvature of the guiding portion 10 at this position is the greatest among the curvatures of the guiding portion 10 of the whole cap.
Accordingly, distances between the movement-restricting steps 22 and both the auxiliary visors 30 are equally formed to be a minimum distance d3.
Also, here, the intermediate guiding protrusion 34-3 of each of both of the auxiliary visors 30 moves toward the end of the guiding hole 24 closest to the movement-restricting step 22.
However, although the guiding rail 13 of the guiding portion 10 is inserted into and held by the inside of the guiding protrusion portion 34 of the auxiliary visor 30 to allow the auxiliary visor 30 to be slidably movable without separating from the guiding portion 10, a height of the guiding rail 13 is low such that there is a possibility of the guiding protrusion portion 34 being separated from the guiding rail 13 while the visor 2 is rotated along the guiding portion 10.
To prevent this, in the embodiment of the present inventive concept, the main visor 20 and an outside of the variable surface 21 are coupled using the intermediate guiding protrusion 34-3 of the auxiliary visor 30 and the main visor 20 and an inside of the variable surface 21 are coupled using the coupling protrusion 35. Since the above-described coupling configuration supports the triangular-shaped auxiliary visor 30 on both sides with a certain distance therebetween, a phenomenon in which the guiding protrusion portion 34 of the auxiliary visor 30 is separated and is taken off of the guiding rail 13 does not occur during a visor rotation process of
Meanwhile, since a shape of the guiding portion 10 varies according to the head shape of a person when the person wears the cap according to the embodiment of the present inventive concept, the curvature formed by the guiding portion 10 may be formed to be different from a curvature formed by the elliptical-shaped guiding portion 10 shown in
However, according to the present inventive concept, no matter what the curvature of the guiding portion 10 is changed to, the auxiliary visor 30 moves along the guiding portion 10 while automatically changing a distance from the movement-restricting step 22 according to the changed curvature. Accordingly, the visor 2 of the cap according to the present inventive concept smoothly rotates along the guiding portion 10 regardless of head shapes of people.
The embodiment of the present inventive concept which has been described above and illustrated in the drawings should not be construed as limiting the technical scope of the present inventive concept. The scope of the present inventive concept should be recognized only by the content disclosed in the claims, and a variety of modifications and changes of the technical concept of the present inventive concept may be made by one of ordinary skill in the art. Accordingly, the modifications and changes are included in the scope of the present inventive concept when they are obvious to one of ordinary skill in the art.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2018-0030383 | Mar 2018 | KR | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/KR2019/002888 | 3/13/2019 | WO |
| Publishing Document | Publishing Date | Country | Kind |
|---|---|---|---|
| WO2019/177359 | 9/19/2019 | WO | A |
| Number | Name | Date | Kind |
|---|---|---|---|
| 5471684 | Casale | Dec 1995 | A |
| 5533211 | Mehrens | Jul 1996 | A |
| 5715534 | Mobley | Feb 1998 | A |
| 5870772 | Sprouse | Feb 1999 | A |
| 6263508 | Davis | Jul 2001 | B1 |
| 20040040067 | Pong | Mar 2004 | A1 |
| 20040055073 | Ahn | Mar 2004 | A1 |
| 20040244094 | Ahn | Dec 2004 | A1 |
| 20060143792 | No | Jul 2006 | A1 |
| 20070017003 | Harris | Jan 2007 | A1 |
| 20120110718 | Kim | May 2012 | A1 |
| 20150296916 | Olivera, II | Oct 2015 | A1 |
| 20170035134 | Olivera, II | Feb 2017 | A1 |
| 20190142095 | Judge | May 2019 | A1 |
| 20210145102 | Tang | May 2021 | A1 |
| Number | Date | Country |
|---|---|---|
| 2019980056034 | Oct 1998 | KR |
| 1020000037084 | Jul 2000 | KR |
| 200213373 | Feb 2001 | KR |
| 200243049 | Oct 2001 | KR |
| 200390299 | Jul 2005 | KR |
| 2020120000242 | Jan 2012 | KR |
| Number | Date | Country | |
|---|---|---|---|
| 20210045484 A1 | Feb 2021 | US |
