Title:
Safety helmet
United States Patent 3239842
US Patent References:
/1293980.html
- - 1293980

Safety hat
- - 2248366

Welder's mask
- - 2363461

Spark deflector/visor assembly
- - 2755476

Ear-enveloping cups
- - 2802214


Inventors:
Marchello, John L.
Publication Date:
03/15/1966
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Assignee:
JOSEPH BUEGELEISEN COMPANY
Primary Class:
2/422
Other Classes:
2/10, 2/423, D29/105
International Classes:
A42B3/22; A42B3/32; A42B3/18
US Patent References:
2991478Safety helmet
3039108Protective helmet
3147487Conversion shield for mask window
Foreign References:
GB530434A