Stethoscope

Details Stethoscope Stethoscope

1996-02-12

1998-02-10

Zarfas, Louis S.

Medical and laboratory equipment

Equipment for diagnosis, analysis, or treatment

Hand manipulated tool or instrument

D24133, 2402

Patent

active

D03906604

REFERENCES:
patent: D205171 (1966-06-01), Littmann
patent: D208125 (1967-07-01), Cefaly
patent: 2233087 (1941-02-01), Tynan
patent: 2722989 (1955-11-01), Tynan
patent: 3303903 (1967-02-01), Speelman

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