US PATENT SUBCLASS 381 / 179
.~.~ Resistive

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


381 /   HD   ELECTRICAL AUDIO SIGNAL PROCESSING SYSTEMS AND DEVICES

150  DF  ELECTRO-ACOUSTIC AUDIO TRANSDUCER {18}
369  DF  .~ Microphone capsule only {10}
179.~.~ Resistive {1}
180  DF  .~.~.~> Granular or carbon {1}

DEFINITION

Classification: 381/179

Resistive:

(under subclass 168) Subject matter having an element the resistance of which is varied by incident sound waves.

SEE OR SEARCH CLASS

338, Electrical Resistors, appropriate subclasses for a condition responsive variable resistor.