Disposable surgical mask
United States Patent 3170461
US Patent References:
/1292095.html
- - 1292095

Face mask
- - 1987922

Anti-bacterial masks
- - 2751905


Inventors:
Watts Jr., Hillary G.
Publication Date:
02/23/1965
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Assignee:
Watts Jr., Hillary G.
Primary Class:
128/863
International Classes:
A41D13/11; A41D13/05
Foreign References:
GB191305104A
GB442725A