US PATENT SUBCLASS 379 / 400
.~ For line length compensation

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

399  DF  SUBSCRIBER LINE OR TRANSMISSION LINE INTERFACE {5}
400.~ For line length compensation {1}
401  DF  .~.~> Voltage boosting circuit

DEFINITION

Classification: 379/400

For line length compensation:

(under subclass 399) Subject matter including structure to change an electrical parameter in a complementary relationship with a distance-related effect on a telephone signal.

(1) Note. Amplifying of a telephone signal is classified in subclasses 338+.