Title:
Face mask
United States Patent 2507705
Inventors:
Gaddini, Norman E.
Publication Date:
05/16/1950
Export Citation:
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Assignee:
Gaddini, Norman E.
Primary Class:
128/205.25
Other Classes:
128/200.28, 128/204.15
International Classes:
A62B18/04; A62B18/00
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US Patent References:
2447433Protective hood
2402820Welder's mask
2377122Welding helmet
2362240Breathing device
2259680Workman's protective hood
1646103Compressed-air protective shield
0807666N/A
0804272N/A