Title:
Practice ball
United States Patent 3081091
US Patent References:
Golf ball
- - 1583721

Indicating disk for golf club heads
- - 2660436

Swing indicator for a golf club
- - 3037778


Inventors:
Grow, Harlow B.
Publication Date:
03/12/1963
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Assignee:
Craig, Grow H.
Bruce, Grow W.
Primary Class:
473/280
Other Classes:
473/237
International Classes:
A63B69/36