Patent Grant
11964191
This disclosure relates to golf clubs. More specifically, this disclosure relates to golf club alignment.
Aspects of the invention are directed to golf club heads including a body having a face, a crown and a sole together defining an interior cavity, the golf club body including a heel and a toe portion and having x, y and z axes which are orthogonal to each other having their origin at USGA center face and wherein the golf club head has a primary alignment feature comprising a paint or masking line which delineates the transition between at least a first portion of the crown having an area of contrasting shade or color with the shade or color of the face.
In some embodiments the golf club head includes a body having a face, a sole and a crown, the crown having a first portion having a first color or shade and a second portion having a second color or shade, the face crown and sole together defining an interior cavity, the golf club body including a heel and a toe portion and having x, y and z axes which are orthogonal to each other having their origin at USGA center face and wherein the golf club head has a primary alignment feature comprising a paint or masking line which delineates the transition between at least a first portion of the crown having an area of contrasting shade or color and the area of shade or color of the face, and the club head also includes a secondary alignment feature including a paint or masking line which delineates the transition between the first portion of the crown having an area of contrasting shade or color with the shade or color of the face; and a second portion of the crown having an area of contrasting shade or color with the shade or color of the first portion, the secondary alignment feature comprising a first elongate side having a length of from about 0.5 inches to about 1.7 inches, and a second and third elongate side extending back from the face and rearward from and at an angle to the first elongate side.
In some embodiments the golf club heads have a body having a face, a crown and a sole together defining an interior cavity, the golf club body also includes a heel and a toe portion and a portion of the crown comprises an electronic display, wherein the electronic display includes an organic light-emitting diode (OLED) display for providing active color and wherein the OLED display is divided into independently operating electronic display zones.
In some embodiments the golf club heads have a body having a face, a crown and a sole together defining an interior cavity, the golf club body also includes a heel and a toe portion and a portion of the crown or a layer covering at least a portion of the crown of the golf club head is covered by a dielectric coating system.
The features and components of the following figures are illustrated to emphasize the general principles of the present disclosure. Corresponding features and components throughout the figures may be designated by matching reference characters for the sake of consistency and clarity.
Disclosed are various golf clubs as well as golf club heads including alignment features along with associated methods, systems, devices, and various apparatus. It would be understood by one of skill in the art that the disclosed golf clubs and golf club heads are described in but a few exemplary embodiments among many. No particular terminology or description should be considered limiting on the disclosure or the scope of any claims issuing therefrom.
The sport of golf is fraught with many challenges. Enjoyment of the game is increased by addressing the need to hit the golf ball further, straighter, and with more skill. As one progresses in golfing ability, the ability to compete at golf becomes a source of enjoyment. However, one does not simply hit a golf ball straighter or further by mere desire. Like most things, skill is increased with practice—be it repetition or instruction—so that certain elements of the game become easier over time. But it may also be possible to improve one's level of play through technology.
Much technological progress in the past several decades of golf club design has emphasized the ability to hit the golf ball further. Some of these developments include increased coefficient of restitution (COR), larger golf club heads, lighter golf club heads, graphite shafts for faster club speed, and center of gravity manipulation to improve spin characteristics, among others. Other developments have addressed a golfer's variability from shot-to-shot, including larger golf club heads, higher moment of inertia (MOI), variable face thickness to increase COR for off-center shots, and more. Still further developments address a golfer's consistent miss-hits—of which the most common miss-hit is a slice—including flight control technology (FCT, such as loft and lie connection sleeves to adjust, inter alia, face angle), moveable weights, sliding weight technologies, and adjustable sole pieces (ASP). Such technologies aid golfers in fixing a consistent miss, such that a particular error can be addressed.
As such, modern technology has done much to improve the golfer's experience and to tailor the golf club to the needs of the particular player. However, some methods are more effective than others at achieving the desired playing results. For example, research suggests that—for a drive of about 280 yards—a 1° difference in face angle at impact may account for about 16 yards of lateral dispersion in the resultant shot. Similarly, for moveable weights, changes in balance of weight by 12 grams moving for about 50 mm may result in about 15 yards of lateral dispersion on the resultant shot. However, it is also understood that a change in lie angle of the golf club head affects the face angle, but at a much smaller degree. As such, simply by increasing lie angle by 1°, the face angle alignment of the golf club head may be adjusted by 0.1° open or closed. As such, for better players who are simply trying to tune their ball flight, adjusting lie angle may be much more finely tunable than adjusting face angle. However, for many golfers, slicing (a rightward-curving shot for a right-handed golfer, as understood in the art) is the primary miss, and correction of such shot is paramount to enjoyment of the game.
One of the major challenges in the game of golf involves the difference between perception and reality. Golf includes psychological challenges—as the player's confidence wanes, his or her ability to perform particular shots often wanes as well. Similarly, a player's perception of his or her own swing or game may be drastically different from the reality. Some technology may address the player's perception and help aid in understanding the misconceptions. For example, technology disclosed in U.S. Pat. No. 8,771,095 to Beach, et. al, entitled “CONTRAST-ENHANCED GOLF CLUB HEADS,” filed Mar. 18, 2011, provides a player with a clearer understanding of his or her alignment than some of the preexisting art at the time, which may improve that player's ability to repeat his or her shots. However, it may be more helpful to provide those players a method to address the misconceptions and provide correction for them.
We have now surprisingly found that alignment features that includes all or a portion of the interface region between the areas of contrasting shade or color on the crown of the club head and the face of the club head and/or all or a portion of the interface region between areas of contrasting shade or color on different portions on the crown of the club head allows for improved performance in the resulting clubs by accounting for not only the actual alignment of the club head by the golfer during the shot but also as modified by the perceived alignment of the club head by the golfer. One example of a combination of contrasting colors or shades would be for example a black or metallic grey or silver color contrasting with white, but also included are other combinations which provide at a minimum a “just noticeable difference” to the human eye.
Although a “just noticeable difference” in terms of colors of a golf club head is to a degree somewhat subjective based on an individual's visual acuity, it can be quantified with reference to the CIELAB color system, a three dimensional system which defines a color space with respect to three channels or scales, one scale or axis for Luminance (lightness) (L) an “a” axis which extends from green (−a) to red (+a) and a “b” axis from blue (−b) to yellow (+b). This three dimensional axis is illustrated in
A color difference between two colors can then be quantified using the following formula;
ΔE*ab=√{square root over ((L*2−L*1)2+(a*2−a*1)2+(b*2−b*1)2)}
Thus, for the alignment features of the golf clubs of the present invention, a contrasting color difference, ΔE*ab, is greater than 2.3, preferably greater than 10, more preferably greater than 20, even more preferably greater than 40 and even more preferably greater than 60.
For general reference, a golf club head 100 is seen with reference to
The metal wood club head 100 has a volume, typically measured in cubic-centimeters (cm3), equal to the volumetric displacement of the club head 100, assuming any apertures are sealed by a substantially planar surface. (See United States Golf Association “Procedure for Measuring the Club Head Size of Wood Clubs,” Revision 1.0, Nov. 21, 2003). In other words, for a golf club head with one or more weight ports within the head, it is assumed that the weight ports are either not present or are “covered” by regular, imaginary surfaces, such that the club head volume is not affected by the presence or absence of ports. In several embodiments, a golf club head of the present application can be configured to have a head volume between about 110 cm3 and about 600 cm3. In more particular embodiments, the head volume is between about 250 cm3 and about 500 cm3. In yet more specific embodiments, the head volume is between about 300 cm3 and about 500 cm3, between 300 cm3 and about 360 cm3, between about 360 cm3 and about 420 cm3 or between about 420 cm3 and about 500 cm3.
In the case of a driver, the golf club head has a volume between approximately 300 cm3 and approximately 460 cm3, and a total mass between approximately 145 g and approximately 245 g. In the case of a fairway wood, the golf club head 10 has a volume between approximately 100 cm3 and approximately 250 cm3, and a total mass between approximately 145 g and approximately 260 g. In the case of a utility or hybrid club the golf club head 10 has a volume between approximately 60 cm3 and approximately 150 cm3, and a total mass between approximately 145 g and approximately 280 g.
A three dimensional reference coordinate system 200 is shown. An origin 205 of the coordinate system 200 is located at the center of the face (CF) of the golf club head 100. See U.S.G.A. “Procedure for Measuring the Flexibility of a Golf Clubhead,” Revision 2.0, Mar. 25, 2005, for the methodology to measure the center of the striking face of a golf club. The coordinate system 200 includes a z-axis 206, a y-axis 207, and an x-axis 208 (shown in
As seen with reference to
Referring back to
For the sake of the disclosure, portions and references disclosed above will remain consistent through the various embodiments of the disclosure unless modified. One of skill in the art would understand that references pertaining to one embodiment may be included with the various other embodiments.
As seen with reference to
For reference, a face angle tangent 505 is seen in
The purpose of highlighting such features of the golf club head 500 is to provide a basis for the discussion of alignment with respect to the current disclosure. Through variations in alignment patterns, it may be possible to influence the golfer such that the golfer alters his or her play because of the appearance of misalignment. If a player perceives that the golf club head is such that the face is open with reference to the intended target, he or she would be more likely to try to “square up” the face by manually closing it. Many golfers prefer not to perceive a metal wood golf club head as appearing closed, as such an appearance is difficult to correct. However, even if such a player were to perceive the metal wood head as being closed, such perception does not mean that the golf club head is aligned in a closed position relative to the intended target.
As seen with reference to
In various embodiments, a perceived angle may be determined by finding a linear best-fit line of various points. For such approximation, a perceived angle tangent may be determined by best fitting points on the edge 614 at coordinates of the x-axis 208 that are coincident with center face 205—point 612—and at points ±5 mm of CF 205 (points 622a,b), at points ±10 mm of CF 205 (points 624a,b), at points ±15 mm of CF 205 (points 626a,b), and at points ±20 mm of CF 205 (points 628a,b). As such, nine points are defined along the edge 614 for best fit of the top tangent 610. In the current embodiment, the perceived angle tangent is the same as the top tangent 610.
However, such method for determining the perceived angle tangent may be most useful in cases where the edge 614 of an area of contrasting paint or shading of the crown 120 relative to the color or shading of the face 110 includes different radii of relief along the toe portion and the heel portion. In such an embodiment, a line that is tangent to the edge 614 at point 612 may not adequately represent the appearance of the alignment of the golf club head 600. Such an example can be seen with reference to
As seen in
A golf club head 800, as seen in
However, with sufficient use, the alignment feature 805 can become the primary focus of the golfer's attention and, as such, modifications to the arrangement of the alignment feature 805 with respect to the x-axis 208 (which is coincident with the face angle tangent 505) may allow the golfer to bias his or her shots and thereby modify his or her outcome.
As seen with reference to
For the embodiment including second elongate side 907b, the second elongate side 907b is about parallel to the elongate side 907a. As such, the embodiment is similar to golf club head 800 but is oriented at angle 915. With respect to extended rear portion 907c, the orientation of such an embodiment may appear less askew and, consequently, may be more effective at modifying the golfer's perception of the club's alignment. A perpendicular reference line 918 is seen as a reference for being orthogonal to the elongate side 907a. The perpendicular reference line 918 intersects the elongate side 907a at a point 919 that bisects the elongate side 907a. Further, the perpendicular reference line 918 intersects the x-axis 208 at an intersection point 921 that is heelward of the center face 205. In the current embodiment, the intersection point 921 is heelward of center face 205 by about 2 mm. In various embodiments, the intersection point 921 may be about the same as center face 205. In various embodiments, the intersection point 921 may be up to 2 mm heelward of center face 205. In various embodiments, the intersection point 921 may be up to 5 mm heelward of center face 205. In various embodiments, the intersection point 921 may be somewhat toeward of center face 205. In various embodiments, the intersection point 921 may be ±2 mm of the center face 205.
Another embodiment of a golf club head 1100, shown in
The apparatus used is shown in
The image from the camera is then analyzed using an image analyzer software package (which can be any of these known in the art able to import an image and can fit a line to the image using a curve fitting function). A best fit line to the paint line is then determined. For most embodiments the best fit to the paint line results from fitting the line to a quadratic equation of the form y=ax2+bx+c. Two points are then selected on this best fit line at arc length between +/−0.25 mm from the datum point. A straight line is then drawn between the two points and a line perpendicular to this line is then drawn through the datum. The Sight Adjusted Perceived Face Angle (SAPFA) is then measured as the angle between the perpendicular line and the y axis.
Using this method the Sight Adjusted Perceived Face Angle (SAPFA) of the golf clubs of the present invention may be from −2 to 10, preferably from 0 to 6, more preferably from 0.5 to 4 even more preferably from 1 to 2.5 and most preferably from 1.5 to 2 degrees.
Four identical club heads were taken and the paint line edge of an area of contrasting paint or shading of the crown 120 relative to the color or shading of the face 110 was varied and the Sight Adjusted Perceived Face Angles (SAPFA) measured.
In addition to the Sight Adjusted Perceived Face Angles (SAPFA) four additional measurements were taken to describe the paint line edge alignment feature of the four clubs and these values are summarized in Table 1.
In addition to the SAPFA, three additional angles were measured at different points as measured from the datum along the best fit line to the paint line edge alignment feature determined as for the SAPFA. The first angle was obtained at a point along the best fit line at an arc length 25 mm heelward of the datum. Again as for the SAPFA measurement, two points at arc length between +/−0.25 mm from the 25 mm point were selected. A straight line is then drawn between these two points and a line perpendicular to this line is then drawn at the 25 mm point. The angle is then measured between this perpendicular line and the y axis. This angle is reported as the Sight Adjusted Perceived Face Angle 25 mm Heelward (“SAPFA25H”).
The second angle was obtained at a point along the best fit line at an arc length 25 mm toeward of the datum. Again as for the SAPFA measurement, two points at arc length between +/−0.25 mm from the 25 mm point were selected. A straight line is then drawn between the two points and a line perpendicular to this line is then drawn at the 25 mm point. The angle is then measured between this perpendicular line and the y axis. This angle is reported as the Sight Adjusted Perceived Face Angle 25 mm Toeward (“SAPFA25T”).
In addition, to capture any effect of greater rounding of the paint line edge alignment feature towards the toe of the golf club head, a third angle was obtained at a point along the best fit line at an arc length 50 mm toeward of the datum. Again as for the SAPFA measurement, two points at arc length between +/−0.25 mm from the 25 mm point were selected. A straight line is then drawn between the two points and a line perpendicular to this line is then drawn at the 50 mm point. The angle is then measured between this perpendicular line and the y axis. This angle is reported as the Sight Adjusted Perceived Face Angle 50 mm Toeward (“SAPFASOT”).
Finally, in an attempt to describe more of the paint line edge alignment feature, the image of the paint line edge alignment feature imported into the image analyzer as for the SAPFA measurement was also fit to a circle using the formula (x−a)2+(y−b)2=r2, and the radius of curvature of this circular fit line determined and reported in Table 1 as the Radius of Curvature (circle fit).
Each club was then hit between 6 to 12 times by 10 different players into a blank screen with no trajectory or other feedback available to the player, and a Trackman 3e launch monitor and the TPS software package were used to calculate the total dispersion from a center target line with a positive total dispersion indicating the number of yards right of the center target line and a negative total dispersion indicating the number of yards left of the center target line. Thus, a player who has a tendency to slice the ball i.e. produce a ball flight right of the target line would be assisted in producing a shot closer to the target line if the golf club tended to yield a more negative dispersion.
The graph in
The golf club heads of the present invention have a Sight Adjusted Perceived Face Angle (SAPFA) of from about −2 to about 10, preferably of from about 0 to about 6, more preferably of from about 0.5 to about 4 even more preferably of from about 1 to about 2.5 and most preferably of from about 1.5 to about 2 degrees.
The golf club heads of the present invention also have a Sight Adjusted Perceived Face Angle 25 mm Heelward (“SAPFA25H”) of from about −5 to about 2, more preferably of from about −3 to 0, even more preferably of from about −2 to about −1 degrees.
The golf club heads of the present invention also have a Sight Adjusted Perceived Face Angle 25 mm Toeward (“SAPFA25T”) of from 0 to about 9, more preferably of from about 1 to about 4.5, even more preferably of from about 2 to about 4 degrees.
The golf club heads of the present invention also have a Sight Adjusted Perceived Face Angle 50 mm Toeward (“SAPFA50T”) of from about 2 to about 9, more preferably of from about 3.5 to about 8, even more preferably of from about 4 to about 7 degrees.
The golf club heads of the present invention also have a Radius of Curvature (circle fit) of from about 300 to about 1000, more preferably of from about 400 to about 900, even more preferably of from about 500 to about 775 mm.
In other embodiments, the golf club head in addition to having a first or primary alignment feature as described earlier with reference to
In an especially preferred embodiment, shown in
The Sight Adjusted Perceived Face Angle Secondary Alignment Feature, (“SAPFASAF”) of the secondary alignment feature constituting elongate side 1406 and the second and third elongate sides 1408a and 1408b may be measured by importing the image of the club head obtained as per the measurement for the SAPFA. Points 1410b and 1410a are selected which are the innermost ends of the radii connecting lines 1408b and 1408a with elongate side 1406 as shown in
In some embodiments, the golf club heads of the present invention also have a Sight Adjusted Perceived Face Angle Secondary Alignment Feature, (“SAPFASAF”) of from about −2 to about 6, more preferably of from 0 to about 5, even more preferably of from about 1.5 to about 4 degrees.
The primary and secondary alignment features as described herein typically utilize paint lines which demark the edge of an area of contrasting paint, e.g., between first crown portion 120a and second crown portion 120b, or shading of the crown 120 relative to the color or shading of the face 110. Preferably the contrasting colors are white in the crown area (e.g., first crown portion 120a) and black in the face area. Typically painting or shading of golf club heads is performed at the time of manufacture and thus are fixed for the lifetime of the club absent some additional painting performed after purchase by the owner. It would be highly advantageous if the profile of the alignment features could be adjusted by the user using a simple method which would allow adjustment of the perceived face angle by the user in response to the golfer's observed ball direction tendency on any given day.
In some embodiments of the golf club heads of the present invention the crown 120 comprises a rotatable or otherwise movable portion, e.g., the first crown portion 120a, with one side of said portion including the edge of an area of contrasting paint or shading, of the crown 120 relative to the color or shading of the face 110 or relative to the color or shading of the second crown portion 120b, which can be rotated or moved sufficient to yield the desired Perceived Face Angle, PFA and/or Sight Adjusted Perceived Face Angle (SAPFA) and/or Sight Adjusted Perceived Face Angle Secondary Alignment Feature, (“SAPFASAF”) to produce the desired ball flight. The movable portion of the crown is held in position by a fastening device such as a screw or bolt or other fastening means 1415, which is loosened to allow for rotation or movement and then subsequently tightened to fix the position of the crown after adjustment.
In addition to a portion of the crown being movable, other embodiments include a movable layer or cover on top of the crown with one side of said movable layer or cover including the edge of an area of contrasting paint or shading of the crown 120, e.g., the first crown portion 120a, relative to the color or shading of the face 110 or relative to the color or shading of the second crown portion 120b, which can be rotated or moved sufficient to yield the desired Perceived Face Angle, PFA and/or Sight Adjusted Perceived Face Angle (SAPFA) and/or Sight Adjusted Perceived Face Angle Secondary Alignment Feature, (“SAPFASAF”), The movable portion of the layer or cover is again held in position by a fastening device such as a screw or bolt or other fastening means 1415, which is loosened to allow for rotation or movement and then subsequently tightened to fix the position of the movable layer or cover after adjustment.
In other embodiments a portion of the crown 120. e.g., first crown portion 120a, second crown portion 120b, or both, may comprise electronic features, e.g., electronic graphic display 1440, e.g., as illustrated in
In other embodiments, a portion of the crown 120, e.g., first crown portion 120a, second crown portion 120b, or both, may comprise a coating that alters its characteristics when exposed to external conditions including but not limited to thermochromic coatings, photochromic coatings, electrochromic coatings and paramagnetic paint.
In one preferred embodiment, illustrated, e.g., with regard to
In some embodiments, the at least a portion of the crown 120 of the golf club head, e.g., first crown portion 120a, second crown portion 120b, or both or a layer covering at least a portion of the crown of the golf club head is segmented into portions which may be controlled differently from each other. For example, one side of the alignment feature, e.g., second crown portion 120h or face 110, has a static surface color and the other side, e.g., first crown portion 120a or crown 120, a second, contrasting surface color display capability, e.g., electronic graphic display 1440.
The display 1440 is operatively connected to a microprocessor 1450 disposed in the golf club head (e.g., via wires). The microprocessor is further operatively connected to a data port 1460, for example a universal serial bus (USB) port (e.g., via wires). The data port allows transfer and retrieval of data to and from the microprocessor. Data ports and data transfer protocols are well known to one of ordinary skill in the art. The data port (e.g., a USB port) may be disposed in the rearward area of the golf club head.
Data can be obtained from a variety of sources 1480. In some embodiments, an Internet website 1484 is dedicated to support of the golf club head of the present invention. For example, the website may contain downloadable data and protocols (e.g., colors, color patterns, images, video content, logos, etc.) that can be uploaded into the microprocessor 1450 of the golf club head (via the data port 1460, via a cable, via a computer 1482). As an example, the website may have a gallery for choosing colors to be displayed, as well as patterns of the colors.
In some embodiments, data can be uploaded from other sources 1480, for example DVDs, CDs, memory devices (e.g., flash memory) 1486, and the like, Sources may also include cellular phones, smart phones, personal digital assistants (PDAs), digital vending kiosks 1488, and the like. In some embodiments, the data can be uploaded and downloaded via other mechanisms, for example, wired mechanisms 1490 or wirelessly 1495, e.g., via a wireless mechanism 1465. Such mechanisms may include Bluetooth™, infrared datalink (IrDa), Wi-Fi, UWB, and the like.
In some embodiments, as illustrated in
The microprocessor 1450 and/or display 1440 are operatively connected to a power source, for example a battery 1472. The battery may be rechargeable. In some embodiments, the battery comprises a control means 1474 for turning on and off the device. All wires and data ports and other electronic systems are adapted to sustain the impact forces incurred when a golfer hits a golf ball with the golf club head.
In other embodiments of the golf club heads of the present invention a method to accomplish user adjustably of the alignment feature would involve at least a portion of the crown 120 of the golf club head, e.g., first crown portion 120a, second crown portion 120b, or both, or a layer covering at least a portion of the crown of the golf club head, being covered by a dielectric electroluminescent coating system using as one example the materials and methods as described in U.S. Pat. No. 6,926,972 by M. Jakobi et al., issuing on Aug. 9, 2005 and assigned to the BASF Corporation, the entire contents of which are incorporated by reference herein. Using this technology an electric current (provided by a small battery e.g., battery 1472, fixed securely in the golf chub head cavity) could be selectively employed to use electroluminescence to highlight (or eliminate) a particular color thereby adjusting the orientation of the primary or secondary alignment features described herein.
In addition to the alignment features described herein, the golf club heads of the present invention may also incorporate additional, such features including but not limited to:
The designs, embodiments and features described herein may also be combined with other features and technologies in the club-head including:
One should note that conditional language, such as, among others, “can,” “could,” “might,” or “may,” unless specifically stated otherwise, or otherwise understood within the context as used, is generally intended to convey that certain embodiments include, while other embodiments do not include, certain features, elements and/or steps. Thus, such conditional language is not generally intended to imply that features, elements and/or steps are in any way required for one or more particular embodiments or that one or more particular embodiments necessarily include logic for deciding, with or without user input or prompting, whether these features, elements and/or steps are included or are to be performed in any particular embodiment.
It should be emphasized that the above-described embodiments are merely possible examples of implementations, merely set forth for a clear understanding of the principles of the present disclosure. Any process descriptions or blocks in flow diagrams should be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps in the process, and alternate implementations are included in which functions may not be included or executed at all, may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present disclosure. Many variations and modifications may be made to the above-described embodiment(s) without departing substantially from the spirit and principles of the present disclosure. Further, the scope of the present disclosure is intended to cover any and all combinations and sub-combinations of all elements, features, and aspects discussed above. All such modifications and variations are intended to be included herein within the scope of the present disclosure, and all possible claims to individual aspects or combinations of elements or steps are intended to be supported by the present disclosure.
This application is a continuation of and claims priority to U.S. patent application Ser. No. 16/046,106, filed Jul. 26, 2018, which is a continuation of and claims priority to U.S. patent application Ser. No. 15/197,551, filed Jun. 29, 2016, now U.S. Pat. No. 10,052,530, which claims benefit of priority under 35 U.S.C. § 119(e) to Provisional Application No. 62/185,882 entitled “GOLF CLUB” filed Jun. 29, 2015, both of which are incorporated by reference herein in their entirety. This application references U.S. Pat. No. 8,771,095 to Beach, et. al, entitled “CONTRAST-ENHANCED GOLF CLUB HEADS,” filed Mar. 18, 2011.
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| Number | Date | Country | |
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| 20190232121 A1 | Aug 2019 | US |
| Number | Date | Country | |
|---|---|---|---|
| 62185882 | Jun 2015 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 16046106 | Jul 2018 | US |
| Child | 16352537 | US | |
| Parent | 15197551 | Jun 2016 | US |
| Child | 16046106 | US |
