Bowling instruction device
United States Patent 2994968
US Patent References:
/0965591.html
- - 0965591

/1302897.html
- - 1302897

Automatic bowling alley
- - 1431695

Bowling alley
- - 2375663


Inventors:
Phillips, Elvet E.
Publication Date:
08/08/1961
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Assignee:
Phillips, Elvet E.
Primary Class:
434/249
Other Classes:
473/55, 473/110, 473/109
International Classes:
A63D5/00; A63B69/00