Title:
Surgical mask
United States Patent 3315672
US Patent References:
/0437915.html
- - 0437915

/1101898.html
- - 1101898

/1221446.html
- - 1221446

Gas-mask
- - 1348819

Respirator
- - 2858828


Inventors:
Cunningham, Frank W.
Luck, James V.
Publication Date:
04/25/1967
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Assignee:
Cunningham, Frank W.
Luck, James V.
Primary Class:
128/863
Other Classes:
D24/110.400
International Classes:
A41D13/11; A62B18/00; A41D13/05
US Patent References:
3058463Surgical mask
3130722Respiratory mask
Foreign References:
FR28334A