US PATENT SUBCLASS 379 / 394
.~ Impedance matching or line equalizing

Current as of: June, 1999
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379 /   HD   TELEPHONIC COMMUNICATIONS

387  DF  SUBSTATION OR TERMINAL CIRCUITRY {7}
394.~ Impedance matching or line equalizing

DEFINITION

Classification: 379/394

Impedance matching or line equalizing:

(under subclass 387) Subject matter wherein the terminal includes a circuit to either make the terminal and line impedances equal, or to equalize frequency attenuation characteristic.

SEE OR SEARCH THIS CLASS, SUBCLASS:

398, for telephone line equalization or impedance matching, other than in terminal circuitry.