Stethoscope

Details Stethoscope Stethoscope

1993-08-16

1995-02-14

Blankenship, Howard B.

Acoustics

Anatomic or prosthetic relation

Ear and mouth

181137, A61B 702

Patent

active

053897471

ABSTRACT:
A stethoscope head comprises a bell housing,for resonating, a diaphragm arrangement for sound communication, and a user operable selector control for selectively providing an opening in the diaphragm.

REFERENCES:
patent: 2414850 (1947-01-01), Brandenburg
patent: 3193047 (1965-07-01), Allen
patent: 3223195 (1965-12-01), Allen
patent: 3302747 (1967-02-01), Taeschler
patent: 3601218 (1970-03-01), Reynolds, Jr.
patent: 3690404 (1972-09-01), Collins
patent: 3951230 (1976-04-01), Littmann
patent: 4027116 (1977-05-01), Nakamura
patent: 4239089 (1980-12-01), Nelson
patent: 4270627 (1981-06-01), Hill
patent: 4669572 (1987-06-01), Fassbender
patent: 4995473 (1991-02-01), Packard
patent: 5022487 (1991-06-01), Kirchner
Gardner D. Hiscox, "Mechanical Movements", 1903; p. 389, Publ. in New York by Norman Henley and Co.

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