(under subclass 130) Subject matter having a sensing element which is to be used in contact with a source of sound and a sound conducting element guiding the sound to an ear contacting element.
SEE OR SEARCH THIS CLASS, SUBCLASS:
135, for subcombination of stethoscope.
SEE OR SEARCH CLASS
73, Measuring and Testing,
585, 591 and 649+, where the stethoscope is part of a testing device which tests articles or mechanisms by sensing the vibrations produced therein.
381, Electrical Audio Signal Processing Systems and Devices 67, for a stethoscope comprising a vibration-electric transducer which senses vibrations of the body by virtue of physical contact between the transducer and the body, there being no acoustical transmission through the air, and in accordance with said vibrations controls an electric current which is applied to a hearing or listening device.
