Ball throwing device
United States Patent 2646785
US Patent References:
Ball-throwing machine
- - 2267162

Baseball pitching machine
- - 2267163

Tennis ball trap
- - 2313409

Rubber spring target trap
- - 2540303


Inventors:
Martin, Goldman
Publication Date:
07/28/1953
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Assignee:
Martin, Goldman
Primary Class:
124/21
Other Classes:
124/51.100
International Classes:
A63B69/40