Protective mask
United States Patent 3196458
US Patent References:
Face mask
- - 2081779

Safety face shield and mask
- - 3103667


Inventors:
Keith, Larry F.
Publication Date:
07/27/1965
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Assignee:
Keith, Larry F.
Primary Class:
2/9
Other Classes:
D29/108
International Classes:
A63B71/10; A63B71/08
Foreign References:
GB190200085A