US PATENT SUBCLASS 714 / FOR 119
.~ By tone signal (371/20.3)

Current as of: June, 1999
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714 /   HD   ERROR DETECTION/CORRECTION AND FAULT DETECTION/RECOVERY

FOR 117  DF  TRANSMISSION FACILITY TESTING (371/20.1) {4}
FOR 119.~ By tone signal (371/20.3)

DEFINITION

Classification: 714/FOR.119

By tone signal:

Foreign art collections including subject matter which includes application of a test signal composed of one or more tone signals.