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Referenced by

Citing PatentFiling dateIssue dateOriginal AssigneeTitle
US41438776 Jun 197713 Mar 1979Golfer's training device
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US438368730 Nov 198117 May 1983Reflecting device for golf training or any other sport using a ball striking staff
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US71532174 Oct 200426 Dec 2006Golf swing training apparatus
US76514053 Nov 200826 Jan 2010Device for visualizing and practicing a correct golf swing
US781551722 Jun 200919 Oct 2010Mirrored feedback system for revealing head movement during golfer's backswing
US79851454 Sep 200926 Jul 2011Portable sports swing feedback apparatus