Protective head covering
United States Patent 3242500
US Patent References:
/1251537.html
- - 1251537
/1262111.html
- - 1262111
/1294863.html
- - 1294863
Insulated and protective helmet
- - 2289345
Athletic protector
- - 2296335
/1251537.html
- - 1251537
/1262111.html
- - 1262111
/1294863.html
- - 1294863
Insulated and protective helmet
- - 2289345
Athletic protector
- - 2296335
Inventors:
Derr, John W.
Publication Date:
03/29/1966
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Export Citation:
Assignee:
Derr, John W.
Primary Class:
Other Classes:
D29/106, 2/205
International Classes:
A42B3/06; A42B3/04