US PATENT SUBCLASS 370 / 276
DUPLEX

Current as of: June, 1999
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370 /   HD   MULTIPLEX COMMUNICATIONS

276DUPLEX {6}
277  DF  .~> Communication over free space {4}
282  DF  .~> Transmit/receive interaction control {4}
293  DF  .~> Duplex repeaters or extenders
294  DF  .~> Time division
295  DF  .~> Frequency division
296  DF  .~> Convertible to half duplex

DEFINITION

Classification: 370/276

DUPLEX:

(under the class definition) Subject matter for effectively transmitting messages simultaneously, one in each direction, over the same transmission medium.

(1) Note. Circuits convertible to full duplex operation are also classified here.

(2) Note. Full duplex describes two data paths which allow simultaneous data transmission in both directions. Half duplex describes one data path which allows data transmission in either of two directions, but only one direction at a time.

SEE OR SEARCH THIS CLASS, SUBCLASS:

272, for a sextuplex system.

273+, for a quadruplex system.

275, for a duplex diplex system. 296, for a circuit convertible to half duplex.

297, for a diplex system.