Dual stethoscope microphone

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Description

FIG. 1 is a front perspective view of a dual stethoscope microphone showing my new design;

FIG. 2 is a rear perspective thereof;

FIG. 3 is a side elevation thereof;

FIG. 4 is a rear elevation thereof;

FIG. 5 is a front elevation thereof;

FIG. 6 is a top plan view thereof.

FIG. 7 is a bottom plan view thereof.

Referenced Cited
U.S. Patent Documents
D208125 July 1967 Cefaly
D213257 January 1969 Littmann
D214002 April 1969 Machlup et al.
3124211 March 1964 Cefaly
3630308 December 1971 Ravin
3951230 April 20, 1976 Littmann
Patent History
Patent number: D256951
Type: Grant
Filed: Jan 26, 1978
Date of Patent: Sep 16, 1980
Inventor: Derek R. Allen (Corona del Mar, CA)
Primary Examiner: Bernard Ansher
Attorney: George F. Bethel
Application Number: 5/872,598
Classifications
Current U.S. Class: D24/20
International Classification: D2402;