Title:
Baseball pitching educational device
Document Type and Number:
United States Patent 3152803

Inventors:
Sain Jr., John F.
Publication Date:
10/13/1964
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Assignee:
Sain Jr., John F.
Primary Class:
473/424
International Classes:
A63B69/00
US Patent References:
0234050
0983315
1808354Spherical geographical globe
2388463Practice golf club
2633320Baseball practicing apparatus
2818255Batting practice device
2935321Ball club
3052993Globe with satellite-orbit demonstrator


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