Title:
Respirator
Document Type and Number:
United States Patent 1359073


Inventors:
King, Frederick W.
King, Walter G.
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Sponsored by:
Flash of Genius
Publication Date:
11/16/1920
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Referenced by:
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Assignee:
JULIUS KING OPTICAL CO
Primary Class:
128/206.150
Other Classes:
128/206.130
International Classes:
A62B18/02; A62B18/00