Exhaust valve of respiratory mask

Details Exhaust valve of respiratory mask Exhaust valve of respiratory mask

1976-02-12

1978-09-05

Ansher, Bernard

Medical and laboratory equipment

Equipment for diagnosis, analysis, or treatment

Orthopedic or chiropractic

D23 19, D2402, D2301

Patent

active

D02492792

REFERENCES:
patent: D234637 (1975-03-01), Flynn
patent: D243635 (1977-03-01), Miller
patent: 2828740 (1958-04-01), Kindred
patent: 2985169 (1961-05-01), Elling
patent: 3199524 (1965-08-01), Mitchell
patent: 3688794 (1972-09-01), Bird et al.

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