Stethoscope chestpiece

Details Stethoscope chestpiece Stethoscope chestpiece

1989-07-28

1992-01-21

Reid, Stella

Medical and laboratory equipment

Equipment for diagnosis, analysis, or treatment

Hand manipulated tool or instrument

Patent

active

D03233944

REFERENCES:
patent: D185178 (1959-05-01), Spears
patent: D205171 (1966-06-01), Littmann
patent: D213257 (1969-01-01), Littmann
patent: D214002 (1969-04-01), Machlup et al.
patent: D256951 (1980-09-01), Allen
patent: D277890 (1985-03-01), Loughridge et al.
patent: 3108652 (1963-10-01), Littmann
patent: 3288246 (1966-11-01), Allen
patent: 3303903 (1967-02-01), Speelman
patent: 3339667 (1967-09-01), Speelman
patent: 3470975 (1969-10-01), Haiken
patent: 3472335 (1969-10-01), Allen
patent: 3570625 (1971-03-01), Allen

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