US PATENT SUBCLASS 375 / 259
SYSTEMS USING ALTERNATING OR PULSATING CURRENT

Current as of: June, 1999
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375 /   HD   PULSE OR DIGITAL COMMUNICATIONS

259SYSTEMS USING ALTERNATING OR PULSATING CURRENT {4}
260  DF  .~> Plural channels for transmission of a single pulse train {2}
268  DF  .~> Amplitude modulation {2}
271  DF  .~> Angle modulation {2}
285  DF  .~> Antinoise or distortion

DEFINITION

Classification: 375/259

SYSTEMS USING ALTERNATING OR PULSATING CURRENT:

(under the class definition) Subject matter using alternating, sine, or similar wave currents or using pulsating currents in the transmission and reception of pulse or digital communications.

(1) Note. A system includes both a transmitter and a receiver.

SEE OR SEARCH CLASS

178, Telegraphy,

66.1+, for telegraph systems using alternating current.

327, Miscellaneous Active Electrical Devices, Circuits, and Systems,

1+, for miscellaneous pulse characteristic discriminating and subclasses 100+ for miscellaneous pulse characteristic modifying.