Bowling lane signalling mechanism
United States Patent 3250535

Inventors:
Hills, George S.
Blewitt Jr., Roy E.
Congelli, Henry C.
Jones, Harold A.
Publication Date:
05/10/1966
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Assignee:
AMERICAN MACH & FOUNDRY
Primary Class:
473/58
Other Classes:
340/323R, 473/113
International Classes:
A63D5/04; A63B69/00; A63D5/00