Title:
APPARATUS AND METHOD TO SELECTIVELY INDICATE BALL POSITIONS
Document Type and Number:
United States Patent 3466038
Inventors:
Hill, Gerard T.
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Publication Date:
09/09/1969
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Referenced by:
Export Citation:
Assignee:
Gerard, Hill T.
Primary Class:
Other Classes:
473/40
International Classes:
A63D15/20; A63D15/00; A63D15/00; A63B71/06
US Patent References: