Mouthpiece for a spirometer

Medical and laboratory equipment – Equipment for diagnosis – analysis – or treatment – Orthopedic or chiropractic

Patent

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Details

D24 99, D21 61, D21 64, D2402

Patent

active

D02666952

REFERENCES:
patent: D242489 (1976-11-01), Burroughs
patent: D242956 (1977-01-01), Miller et al.
patent: 3880591 (1975-04-01), Burroughs
patent: 3936048 (1976-02-01), Dunlap et al.
patent: 4114608 (1978-09-01), Russo
patent: 4221381 (1980-09-01), Ericson
patent: 4232683 (1980-11-01), Bartholomew et al.

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