Face mask breathing valve

Medical and laboratory equipment – Equipment for diagnosis – analysis – or treatment – Article for the introduction – removal or collection of fluids

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Details

D241101, 2902

Patent

active

D04131665

REFERENCES:
patent: D347298 (1994-05-01), Japuntich et al.
patent: D347299 (1994-05-01), Bryant et al.
patent: D389239 (1998-01-01), Scholey
patent: 2751904 (1956-06-01), Lewis
patent: 4756308 (1988-07-01), Ryback

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