Patent ID: 7815517

Claim:
A feedback device, for use by a golfer having a head and a pair of hands, while standing upon a ground surface and taking a golf backswing with a golf club having a head, a shaft, and a handgrip, comprising: a base having a front edge, for resting upon the ground surface in front of the golfer, such that the golfer has a view of said device; a forward plate, extending at an acute predetermined angle to the base plate, extending rearwardly and upwardly from near the front edge, the forward plate having a transparent portion and having a horizontal printed line thereon; and a parallel mirror plate, extending behind the forward plate and substantially parallel thereto, the parallel mirror plate having a mirrored front surface for reflecting the horizontal printed line as a reflected horizontal line, the printed horizontal line selectively blocking the reflected horizontal line with the printed horizontal line when viewed by the golfer at a first viewing angle, the transparent portion selectively allowing the reflected horizontal line to be viewed through the transparent portion of the forward plate when viewed by the golfer at a second viewing angle, the feedback device thereby revealing to the golfer vertical head movements when the golfer's view changes from the first viewing angle to the second viewing angle.