Title:
Cold weather face mask
United States Patent 3333585
US Patent References:
Face mask
- - 3220409

Mask for protecting respiratory tract
- - 3249108


Inventors:
Barghini, Robert J.
Westberg, Walter M.
Carey Jr., Patrick H.
Publication Date:
08/01/1967
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Assignee:
MINNESOTA MINING & MFG
Primary Class:
128/201.130
Other Classes:
128/204.130, D24/110.100
International Classes:
A41D13/11; A41D13/05
Foreign References:
GB416409A
GB780710A