Wrestling helmet
United States Patent 2898596
US Patent References:
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- - 1365425

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- - 1683657

Protecting device for baseball umpires
- - 2001508

Athletic headgear
- - 2277994

Protective helmet
- - 2297874


Inventors:
Keen, Clifford P.
Publication Date:
08/11/1959
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Assignee:
Keen, Clifford P.
Primary Class:
2/421
Other Classes:
2/425
International Classes:
A63B71/10; A63B71/08
US Patent References:
2782423Noise attenuating ear protectors
2867811Chin strap for helmet