Title:
Device for indicating attainment of proper golf swing movements
United States Patent 3368817
US Patent References:
/1316313.html
- - 1316313
Accelerometer
- - 1842384
Indicating device
- - 3156211
Combined golf ball position marker and carrier
- - 3233802
/1316313.html
- - 1316313
Accelerometer
- - 1842384
Indicating device
- - 3156211
Combined golf ball position marker and carrier
- - 3233802
Inventors:
Duncan, Earl N.
Publication Date:
02/13/1968
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Primary Class:
International Classes:
A63B69/36
Foreign References:
| GB635448A |