US2663021A - Optical device for golf instruction - Google Patents

Optical device for golf instruction Download PDF

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Publication number
US2663021A
US2663021A US159685A US15968550A US2663021A US 2663021 A US2663021 A US 2663021A US 159685 A US159685 A US 159685A US 15968550 A US15968550 A US 15968550A US 2663021 A US2663021 A US 2663021A
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screens
golf
screen
visual
apertures
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US159685A
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Robert S Douglass
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    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C11/00—Non-optical adjuncts; Attachment thereof
    • G02C11/12—Side shields for protection of the eyes
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/16—Shades; shields; Obturators, e.g. with pinhole, with slot

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  • This invention relates to an optical device to be used by a golf pupil or player to aid in improving his golf stroke and obtaining increased proficiency in playing the game of golf.
  • the object of this invention is to provide a device to prevent a golf player from removing his eyes from the golf ball during the stroke.
  • Another object of this invention is to provide a device which automatically compels the wearer to assume the correct visual stance in viewing the golf ball in playing golf.
  • My invention is a device to limit the field of vision by means of an eye screen or screens which can be worn in a manner similar to eyeglasses, or a screen or screens to be mounted on eyeglasses or eyeglass frames.
  • the screen or screens comprise opaque or translucent members containing a substantially vertical aperture therein, either fixed or variable, through which the vision of the wearer is limited in extent and in particular to such an area as would permit him to view a golf ball lying or to be placed in a position to be struck with a golf club. Because of the limitations placed on the field of vision by the opaque or translucent screen containing the vertical visual apertures, the wearer can keep the golf ballin View only by holding his head in a substantially fixed position.
  • This fixed position'required to view the ball is the correct position for hitting the ball with a club. Moving the head, except to a very limited extent, would remove the golf ball from the field of vision. The tendency to look up or follow the ball before hitting the ball is thus minimized or obviated.
  • Figure 1 is a perspective view diagrammatically illustrating the optical device of this invention for use of individuals who do not require eyeglasses when playing golf.
  • Figure 2 is a front View diagrammatically illustrating eye screens of my invention for use of golf players who Wear some type of eyeglasses.
  • Figure 3 is an enlarged cross-section of the screen taken along line 33 of Figure 2 showing the attachment of the screen to conventional eyeglasses.
  • Figure 4 is a diagrammatic illustration of a creen having a variable aperture.
  • numeral 4 designates a front frame of slotted construction containing attached to each extremity thereof bows or supports 5 by means of conventional hinges 8.
  • Rectangular screens 5 contain substantially vertical visual apertures or slots 7 and are inserted in the slotted portion of front frame 6.
  • Apertures l are preferably 3- 2- to T 6- of an inch at the center and about /2 to 1 inch in length.
  • Apertures i may be rectangular or elliptical in shape without departing from the scope of this invention.
  • the screens 8 may be constructed of conventional materials, such as glass, plastic and metal, and are preferably opaque but may also be translucent. The purpose of screen 6 is to limit and confine the field vision of the wearer.
  • Apertures l may be either openings in screens 6 or may be constructed of suitable materials which are transparent for visual purposes.
  • screen t may be constructed of glass which, except for aperture l, is etched to prevent vision therethrcugh.
  • Apertures '1 should be positioned substantially in front of the pupils of the eyes of the wearer. As the distance between the eyes of different wearers may be different, it is desirable to provide means for adlusting the positions of the screens 5 and, consequently, the positions of visual slots l.
  • side shields I I which may be attached to bows 5 in a conventional manner, such as by screws 12.
  • These side shields i I may be detached from bows 5 by removing screws l2 depending upon Whether the wearer desires the use of further restriction of his vision.
  • Side shields H may be constructed of similar materials and in a similar manner as screens 6, previously discussed.
  • Figure 2 shows-a type of screen' for usewith eyeglasses.
  • Numeral l3 of Figure 2 designates optical screens [3 of an oval shape and similar I in construction to screens 60f Figure 1.
  • t-Screens 13, as well as screens ii, of Figure 1 may be of any desired shape either oval, rectangular,square or polygonal without departing from the-scope of this invention.
  • Screens l3 contain visual apertures M similar to visual apertures 1 of Figure 1. Spring clips it are attached to the upper portion of screens I3, as shown, so that theeye shields 13 may be snapped onto conventional eyeglasses as shown.
  • the conventional eyeglasses are designated by numeral 16.
  • Numeral l'i designates the rimof the lense. Clips'may'be provided in the lower portion.
  • shields [3 as well as in the upper portion thereof, if desired, without departing from the scope of this invention.
  • Various other methods may be employed to attach optical screens 13 to eyeglasses or sunglasses.
  • the screens may be'adjusted'for the'correst position in viewing the bail dependinng upon the preferred position for the individual wearer.
  • Figure 4 shows a form'of screen in which the aperture is, variable.
  • the optical screen consists of two overlapping semielliptical screen members 19 and 28 held together by meansof a screw 2
  • the semi-elliptical screens l9 and 2B are pivotable upon screw 2
  • the movement of semielliptical screen members it and 20 away or toward each other adjusts the size of the vertical visual aperture 22.
  • Each screen member 19 and 29 contains spring clips 15, similar to clipsv I5 of Figure 3.
  • the screen members 19 andZB are held to eyeglasses by means of thesespring clips l5.
  • screen members [9 andi2il of Figure 4. may be attached to a device similar to that shown in Figure 1, by means of screw, and clips 15 will then be omitted.
  • a device for limiting the field of vision of a'g'olf player to the.immediate regionof the golf ball to be struck by the wearer which comprises two substantially opaque optical screens containing visual portions consisting of a single substantially vertical visual aperture in each screen, said visual apertures having a maximum width of not more than of an inch and a minimum Width of not less than a of an inch and the length of said apertures being between about /2 and about 1 inch, and means for positioning the opticalscreens before the eyes such that the vi,- ual apertures are substantially in front of the pupils of the eyes of the wearer, said vertical visual apertures being similar in shape and location in each of said optical screens.
  • A' device for limiting the field of vision of a goliiplayerto theimmediate region of the golf ball to be struck by the wearer which comprises a substantially opaque optical screen containing a visual portion consisting of a single substantially vertical visual aperture, said optical screen comprising two separate and'overlapping semi-elliptical sections having semi elliptical inner edges and pivoted about a common pivot positioned in the upper portion of said semi-elliptical sections.
  • An optical device for limiting the field of vision of a golf player to the immediate region of the ,golf :ball to be struck by the wearer which comprises in combination a frame, bows attached to the extremity of said frame, two substantially opaque optical screens containing visual portions consisting of a single. substantially vertical'visual aperture in each screen, said visualapertures having a maximum Width of not more than 5%; oiianinch and aminimum width of not less than 01" an inch and thelength of said. apertures being between. about /2 and about 1 inch, and means for attaching said optical screens to said frame, said vertical. visual apertures being positioned centrally and similar in shape and location in each of said optical screens.

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Health & Medical Sciences (AREA)
  • Eyeglasses (AREA)

Description

Dec. 22', 1 R. s. DOUGLASS 2,663,021
OPTICAL DEVICE FOR GOLF INSTRUCTION Filed May 3, 1950 INVENTOR.
ROBERT S. DOUGLASS EEW ATTORNEY Patented Dec. 22, 1953 UNITED STATES 2,663,021 OPTICAL DEVICE FOR GOLFINSTRUCTION Robert S. Douglass, Port Washington, N. Y.
Application May 3, 1950, Serial No. 1595685 3 Claims. (01. 2-14) This invention relates to an optical device to be used by a golf pupil or player to aid in improving his golf stroke and obtaining increased proficiency in playing the game of golf.
It is a well established principle of a properly executed golf stroke or swing that the players head must remain in a substantially fixed posi tion until after the ball is struck. In the teachings and writings of recognized professional golfers, this function of keeping the head in a fixed position is referred to or expressed in various ways such as keeping the eye on the ball, looking at the ball, keeping thechin back, keeping the head down and other terms. It is also recognized that developing the practice of keeping the head in a fixed position is generally difficult of attainment among players learning the game of golf and that even among experienced players and those who have acquired considerable proficiency in the game, failure to keep the head in a fixed position frequently causes a faulty golf stroke to be executed.
The object of this invention is to provide a device to prevent a golf player from removing his eyes from the golf ball during the stroke.
Another object of this invention is to provide a device which automatically compels the wearer to assume the correct visual stance in viewing the golf ball in playing golf.
Various other objects and advantages of the present invention will become apparent from the accompanying description and disclosure.
My invention is a device to limit the field of vision by means of an eye screen or screens which can be worn in a manner similar to eyeglasses, or a screen or screens to be mounted on eyeglasses or eyeglass frames. The screen or screens comprise opaque or translucent members containing a substantially vertical aperture therein, either fixed or variable, through which the vision of the wearer is limited in extent and in particular to such an area as would permit him to view a golf ball lying or to be placed in a position to be struck with a golf club. Because of the limitations placed on the field of vision by the opaque or translucent screen containing the vertical visual apertures, the wearer can keep the golf ballin View only by holding his head in a substantially fixed position. This fixed position'required to view the ball is the correct position for hitting the ball with a club. Moving the head, except to a very limited extent, would remove the golf ball from the field of vision. The tendency to look up or follow the ball before hitting the ball is thus minimized or obviated.
For a better understanding of my invention, reference may be had to the accompanying drawing in which Figure 1 is a perspective view diagrammatically illustrating the optical device of this invention for use of individuals who do not require eyeglasses when playing golf. Figure 2 is a front View diagrammatically illustrating eye screens of my invention for use of golf players who Wear some type of eyeglasses. Figure 3 is an enlarged cross-section of the screen taken along line 33 of Figure 2 showing the attachment of the screen to conventional eyeglasses. Figure 4 is a diagrammatic illustration of a creen having a variable aperture.
According to Figure 1 of the drawing, numeral 4 designates a front frame of slotted construction containing attached to each extremity thereof bows or supports 5 by means of conventional hinges 8. Rectangular screens 5 contain substantially vertical visual apertures or slots 7 and are inserted in the slotted portion of front frame 6. Apertures l are preferably 3- 2- to T 6- of an inch at the center and about /2 to 1 inch in length. Apertures i may be rectangular or elliptical in shape without departing from the scope of this invention. The screens 8 may be constructed of conventional materials, such as glass, plastic and metal, and are preferably opaque but may also be translucent. The purpose of screen 6 is to limit and confine the field vision of the wearer. Therefore, it is essential that such screens be constructed in such a manner as to prevent the wearer from clearly observing objects outside the visual range of the golf ball when lying in position. Apertures l may be either openings in screens 6 or may be constructed of suitable materials which are transparent for visual purposes. For example, screen t may be constructed of glass which, except for aperture l, is etched to prevent vision therethrcugh. Apertures '1 should be positioned substantially in front of the pupils of the eyes of the wearer. As the distance between the eyes of different wearers may be different, it is desirable to provide means for adlusting the positions of the screens 5 and, consequently, the positions of visual slots l. According to the illustration of Figure 1, this is accomplished by providing horizontal slits 9 in frame 4 and conventional thumb screws ill in the upper portion of screens 6. By this manner of construction as shown, the position of each screen (i may be varied as desired. In some instances, the wearer has a tendency to watch objects at the extremities of the eyes thus preventing concentrated vision upon the ball. This may be eliminated or minimized by the use of side shields,
such as side shields I I, which may be attached to bows 5 in a conventional manner, such as by screws 12. These side shields i I may be detached from bows 5 by removing screws l2 depending upon Whether the wearer desires the use of further restriction of his vision. Side shields H may be constructed of similar materials and in a similar manner as screens 6, previously discussed.
Figure 2 shows-a type of screen' for usewith eyeglasses. Numeral l3 of Figure 2 designates optical screens [3 of an oval shape and similar I in construction to screens 60f Figure 1. t-Screens 13, as well as screens ii, of Figure 1 may be of any desired shape either oval, rectangular,square or polygonal without departing from the-scope of this invention. Screens l3 contain visual apertures M similar to visual apertures 1 of Figure 1. Spring clips it are attached to the upper portion of screens I3, as shown, so that theeye shields 13 may be snapped onto conventional eyeglasses as shown. In Figure 3, the conventional eyeglasses are designated by numeral 16. Numeral l'i designates the rimof the lense. Clips'may'be provided in the lower portion. of shields [3 as well as in the upper portion thereof, if desired, without departing from the scope of this invention. Various other methodsmay be employed to attach optical screens 13 to eyeglasses or sunglasses. The screens may be'adjusted'for the'correst position in viewing the bail dependinng upon the preferred position for the individual wearer.
Figure 4 showsa form'of screen in which the aperture is, variable. According toFigure 4, the optical screen consists of two overlapping semielliptical screen members 19 and 28 held together by meansof a screw 2| or..lil:e means. The semi-elliptical screens l9 and 2B are pivotable upon screw 2| and the inner edge of each screen member is semi-elliptical forming a vertical visual aperture 22. The movement of semielliptical screen members it and 20 away or toward each other adjusts the size of the vertical visual aperture 22. Each screen member 19 and 29 contains spring clips 15, similar to clipsv I5 of Figure 3. The screen members 19 andZB are held to eyeglasses by means of thesespring clips l5. Alternatively, screen members [9 andi2il of Figure 4. may be attached to a device similar to that shown in Figure 1, by means of screw, and clips 15 will then be omitted.
l-l'aving described thepreferred form of my invention and having pointed out the principal considerations to be observed in' the construction of equivalent devices it :is obvious that various changes and modifications maybe made without departing from the scope of this invention.
Having described my invention, I claim:
1. A device for limiting the field of vision of a'g'olf player to the.immediate regionof the golf ball to be struck by the wearer which comprises two substantially opaque optical screens containing visual portions consisting of a single substantially vertical visual aperture in each screen, said visual apertures having a maximum width of not more than of an inch and a minimum Width of not less than a of an inch and the length of said apertures being between about /2 and about 1 inch, and means for positioning the opticalscreens before the eyes such that the vi,- ual apertures are substantially in front of the pupils of the eyes of the wearer, said vertical visual apertures being similar in shape and location in each of said optical screens.
2. A' device for limiting the field of vision of a goliiplayerto theimmediate region of the golf ball to be struck by the wearer which comprises a substantially opaque optical screen containing a visual portion consisting of a single substantially vertical visual aperture, said optical screen comprising two separate and'overlapping semi-elliptical sections having semi elliptical inner edges and pivoted about a common pivot positioned in the upper portion of said semi-elliptical sections.
3. An optical device for limiting the field of vision of a golf player to the immediate region of the ,golf :ball to be struck by the wearer which comprises in combination a frame, bows attached to the extremity of said frame, two substantially opaque optical screens containing visual portions consisting of a single. substantially vertical'visual aperture in each screen, said visualapertures having a maximum Width of not more than 5%; oiianinch and aminimum width of not less than 01" an inch and thelength of said. apertures being between. about /2 and about 1 inch, and means for attaching said optical screens to said frame, said vertical. visual apertures being positioned centrally and similar in shape and location in each of said optical screens.
ROBERTS. DOUGLASS.
References Cited in the file of this patent UNITEDSTATES PATENTS Number Name Date 1,135,921 Ramsay Apr. 13, 1915 1,141,432 Stowell June 1, 1915 1,164,375 Mevay Dec. 14, 1915 l,2il6,132 Otte Nov. 28, 1916 1,5o2,s2o Funk July 29, 1924 1,706,682 Takacs Mar. 26, 1929 1,742,649 .Rollins Dec. 31, 1929 2,045,399 lilicMurdo June 23, 1936 2,410,490 Flocker Nov; 5,19%
FOREIGN PATENTS Number Country Date 305,828 Italy Feb. 17, 1933
US159685A 1950-05-03 1950-05-03 Optical device for golf instruction Expired - Lifetime US2663021A (en)

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Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2866202A (en) * 1955-04-07 1958-12-30 Jesse A Landis Eye shield
US3228696A (en) * 1961-07-27 1966-01-11 Charles J Hull Golfing aid
US3436151A (en) * 1964-06-24 1969-04-01 Charles W Conrose Sr Spectacle mounted infinity sight for an athlete
US4022475A (en) * 1974-12-12 1977-05-10 Todd Irma L Golf training aid
GB2125298A (en) * 1982-08-19 1984-03-07 Eos Lee Theunissen Device for use in practising or playing golf
US4739991A (en) * 1987-02-03 1988-04-26 Mary C. Flinn Head positioning aid
EP0298619A1 (en) * 1987-07-10 1989-01-11 Nitta Industries Corporation Device for golf practicing
US5444501A (en) * 1992-12-09 1995-08-22 Aloi; Joanne Golf stabilizer for less dominant eye
US5455639A (en) * 1993-10-29 1995-10-03 Wgm Safety Corp. Protective eyewear with replaceable lens
US5538250A (en) * 1995-02-06 1996-07-23 Putz; Lawrence J. Golf ball sighting device and method therefore
US5675398A (en) * 1995-06-21 1997-10-07 Moore; Gregory S. Sports training eyeglasses having adjustable lenses and method for training therewith
US6558266B2 (en) 2001-03-23 2003-05-06 Mcmahon Anthony Basil Golf training glasses
US7048371B1 (en) * 2004-05-27 2006-05-23 Moore Gregory S Sports training glasses
GB2489768A (en) * 2011-04-05 2012-10-10 Paris Miki Holdings Inc Glasses with a vertical viewing slit to help with a user's gol f technique
US20130053187A1 (en) * 2011-08-25 2013-02-28 Patrick Slater Eyewear For Sports
WO2013028218A1 (en) * 2011-08-24 2013-02-28 Kikuyama Kendall Masao Protective spray painter eye wear
WO2014165716A3 (en) * 2013-04-04 2015-03-05 Jones Michael D Golf training and teaching device
US20160124247A1 (en) * 2013-04-05 2016-05-05 Eyeloc Head Gear Llc Head Alignment Eyewear Devices for Sports Applications and Methods of Using the Same
US20170050100A1 (en) * 2015-08-21 2017-02-23 Anthony Turco Golf Vision Discipline Training System and Method
WO2019104444A1 (en) * 2017-12-01 2019-06-06 1241620 Alberta Ltd. Wearable training apparatus, a training system and a training method thereof
US20220299798A1 (en) * 2021-03-18 2022-09-22 Yon U Jeong Pinhole glasses

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1135921A (en) * 1915-02-19 1915-04-13 Charles Theophilus Ramsay Optical instrument for use in playing the game of golf or like ball games.
US1141432A (en) * 1914-11-03 1915-06-01 Henry F Stowell Optical device for viewing moving pictures.
US1164375A (en) * 1915-04-05 1915-12-14 James Charles Fulton Mevay Non-glare device for the eyes.
US1206132A (en) * 1916-03-03 1916-11-28 Otho M Otte Goggles.
US1502820A (en) * 1923-10-29 1924-07-29 Warren S Funk Antiglare goggles
US1706682A (en) * 1928-05-02 1929-03-26 Takacs Julius Eyeglass shield
US1742049A (en) * 1925-12-28 1929-12-31 Jarrot L Rollins Dimmer glass
US2045399A (en) * 1935-01-15 1936-06-23 Hew B Mcmurdo Glasses
US2410490A (en) * 1942-02-17 1946-11-05 Kerlo Corp Eye protecting shield

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1141432A (en) * 1914-11-03 1915-06-01 Henry F Stowell Optical device for viewing moving pictures.
US1135921A (en) * 1915-02-19 1915-04-13 Charles Theophilus Ramsay Optical instrument for use in playing the game of golf or like ball games.
US1164375A (en) * 1915-04-05 1915-12-14 James Charles Fulton Mevay Non-glare device for the eyes.
US1206132A (en) * 1916-03-03 1916-11-28 Otho M Otte Goggles.
US1502820A (en) * 1923-10-29 1924-07-29 Warren S Funk Antiglare goggles
US1742049A (en) * 1925-12-28 1929-12-31 Jarrot L Rollins Dimmer glass
US1706682A (en) * 1928-05-02 1929-03-26 Takacs Julius Eyeglass shield
US2045399A (en) * 1935-01-15 1936-06-23 Hew B Mcmurdo Glasses
US2410490A (en) * 1942-02-17 1946-11-05 Kerlo Corp Eye protecting shield

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2866202A (en) * 1955-04-07 1958-12-30 Jesse A Landis Eye shield
US3228696A (en) * 1961-07-27 1966-01-11 Charles J Hull Golfing aid
US3436151A (en) * 1964-06-24 1969-04-01 Charles W Conrose Sr Spectacle mounted infinity sight for an athlete
US4022475A (en) * 1974-12-12 1977-05-10 Todd Irma L Golf training aid
GB2125298A (en) * 1982-08-19 1984-03-07 Eos Lee Theunissen Device for use in practising or playing golf
US4739991A (en) * 1987-02-03 1988-04-26 Mary C. Flinn Head positioning aid
EP0298619A1 (en) * 1987-07-10 1989-01-11 Nitta Industries Corporation Device for golf practicing
US5444501A (en) * 1992-12-09 1995-08-22 Aloi; Joanne Golf stabilizer for less dominant eye
US5455639A (en) * 1993-10-29 1995-10-03 Wgm Safety Corp. Protective eyewear with replaceable lens
US5538250A (en) * 1995-02-06 1996-07-23 Putz; Lawrence J. Golf ball sighting device and method therefore
US5675398A (en) * 1995-06-21 1997-10-07 Moore; Gregory S. Sports training eyeglasses having adjustable lenses and method for training therewith
US6558266B2 (en) 2001-03-23 2003-05-06 Mcmahon Anthony Basil Golf training glasses
US7048371B1 (en) * 2004-05-27 2006-05-23 Moore Gregory S Sports training glasses
JP2012217495A (en) * 2011-04-05 2012-11-12 Miki Holdings:Kk Golf glasses
US8449401B2 (en) * 2011-04-05 2013-05-28 Paris Miki Holdings Inc. Golf glasses
GB2489768B (en) * 2011-04-05 2015-08-19 Paris Miki Holdings Inc Golf glasses
GB2489768A (en) * 2011-04-05 2012-10-10 Paris Miki Holdings Inc Glasses with a vertical viewing slit to help with a user's gol f technique
WO2013028218A1 (en) * 2011-08-24 2013-02-28 Kikuyama Kendall Masao Protective spray painter eye wear
US20130053187A1 (en) * 2011-08-25 2013-02-28 Patrick Slater Eyewear For Sports
WO2014165716A3 (en) * 2013-04-04 2015-03-05 Jones Michael D Golf training and teaching device
US9168445B2 (en) * 2013-04-04 2015-10-27 Michael D. Jones Adjustable golf training and teaching device for head and chin adjustment with stereo view of golf ball
US10379385B2 (en) * 2013-04-05 2019-08-13 Eyeloc Head Gear Llc Head alignment eyewear devices for sports applications and methods of using the same
US20160124247A1 (en) * 2013-04-05 2016-05-05 Eyeloc Head Gear Llc Head Alignment Eyewear Devices for Sports Applications and Methods of Using the Same
US20170050100A1 (en) * 2015-08-21 2017-02-23 Anthony Turco Golf Vision Discipline Training System and Method
US9956468B2 (en) * 2015-08-21 2018-05-01 Anthony Turco Golf vision discipline training system and method
WO2019104444A1 (en) * 2017-12-01 2019-06-06 1241620 Alberta Ltd. Wearable training apparatus, a training system and a training method thereof
US20200122015A1 (en) * 2017-12-01 2020-04-23 1241620 Alberta Ltd. Wearable training apparatus, a training system and a training method thereof
US11697055B2 (en) * 2017-12-01 2023-07-11 1241620 Alberta Ltd. Wearable training apparatus, a training system and a training method thereof
US20220299798A1 (en) * 2021-03-18 2022-09-22 Yon U Jeong Pinhole glasses
US11960150B2 (en) * 2021-03-18 2024-04-16 Yon U Jeong Pinhole glasses

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