Putt direction finding method
United States Patent 3293755
US Patent References:
/0458012.html
- - 0458012

/1132349.html
- - 1132349

Plumb or level device
- - 1373336

Combined clinometer and computing instrument
- - 1498631

Clinometer
- - 2694865


Inventors:
Cronwell, Ralph H.
Publication Date:
12/27/1966
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Assignee:
Cronwell, Ralph H.
Primary Class:
33/228
Other Classes:
33/301, 473/409, 434/252, 473/404, 33/402
International Classes:
A63B57/00
US Patent References:
3182401Golfing aid