Title:
Selectively actuated ball path indicator
United States Patent 3301558

Inventors:
Clapham, Wentworth B.
Publication Date:
01/31/1967
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Assignee:
AMERICAN MACH & FOUNDRY
Primary Class:
473/58
Other Classes:
273/DIG.024, 473/59
International Classes:
A63D5/04; A63D5/00
US Patent References:
3120956Manually or automatically illuminated bowling guide
3212779Selectively actuated ball path indicating system