Face filter mask

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

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2902

Patent

active

D03906523

REFERENCES:
patent: D141604 (1945-06-01), Kemp
patent: D270110 (1983-08-01), Moore et al.
patent: D287649 (1987-01-01), Zdrok et al.
patent: D347713 (1994-06-01), Brunson
patent: 4419993 (1983-12-01), Petersen
patent: 4606341 (1986-08-01), Hubbard et al.
patent: 4688566 (1987-08-01), Boyce
patent: 5322061 (1994-06-01), Brunson
patent: 5529056 (1996-06-01), Brunson et al.

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