US PATENT SUBCLASS 381 / 72
HEARING PROTECTORS, ELECTRICAL

Current as of: June, 1999
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381 /   HD   ELECTRICAL AUDIO SIGNAL PROCESSING SYSTEMS AND DEVICES

72HEARING PROTECTORS, ELECTRICAL

DEFINITION

Classification: 381/72

HEARING PROTECTORS, ELECTRICAL:

(under the class definition) Subject matter which provides a barrier to the transmission of at least some sounds to the ear.

SEE OR SEARCH THIS CLASS, SUBCLASS:

68+, for hearing aids, electrical.