Title:
Ball throwing machine having two rotatable discs with converging and diverging interstices
United States Patent 3399660
US Patent References:
Ball throwing device
- - 2729206

Mechanical gun
- - 2737941


Inventors:
Edward, Swartout
Publication Date:
09/03/1968
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Primary Class:
124/6
Other Classes:
124/50
International Classes:
A63B69/40