US PATENT SUBCLASS 379 / FOR 109
HAVING SINGLE CHANNEL TELEPHONE CARRIER (379/64)

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

FOR 109HAVING SINGLE CHANNEL TELEPHONE CARRIER (379/64) {2}
FOR 110  DF  .~> Including call signalling (e.g., ringing, off-hook, dialing) (379/65)
FOR 111  DF  .~> Over power line (379/66)

DEFINITION

Classification: 379/FOR.109

HAVING SINGLE CHANNEL TELEPHONE CARRIER:

Foreign art collection wherein a single telephone speech signal modulates a carrier signal which has a frequency above the range of human audibility.