A - Human Necessities – 62 – B
Patent
A - Human Necessities
62
B
137/1.55
A62B 7/00 (2006.01)
Patent
CA 1269587
ABSTRACT A respirator having a disposable filter includes a valve body having central aperture providing concentric inhalation and exhalation valves.
518307
Kirby Eades Gale Baker
Siebe North Inc.
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