Title:
Respirator mask
United States Patent 2578621


Inventors:
Yant, William P.
Application Number:
US63782245A
Publication Date:
12/11/1951
Filing Date:
12/29/1945
Assignee:
MINE SAFETY APPLIANCES CO
Primary Class:
International Classes:
A62B18/02
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US Patent References:
2415846Oronasal mask1947-02-18
2403046Mask construction1946-07-02
2391677High altitude oxygen supplying mask1945-12-25
2329154Oxygen supplying inhalation mask1943-09-07
2320770Respirator1943-06-01