Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1997-02-24
1998-10-06
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
473150, 473151, 473218, 473220, A63B 6936
Patent
active
058180362
ABSTRACT:
Apparatus and methods for practicing golf involve the use of a projected laser light beam that acts as a fixed guide to the hole or target.
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Kaplan Charles M.
Lee John R.
Westin Edward P.
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