Device for checking golf swing
United States Patent 3071379

Inventors:
Ramsey, Ernest W.
Publication Date:
01/01/1963
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Assignee:
Joseph, Canfield A.
Delmer, Wisner L.
Primary Class:
473/237
Other Classes:
434/252
International Classes:
A63B69/36
US Patent References:
2660436Indicating disk for golf club heads
2714562Self-sealing wrapping material
2914245Accounting machine controlled by differentially coded cards with data comparison of successive cards
Foreign References:
GB189627518A