US PATENT SUBCLASS 370 / 299
.~ Data switching exchange

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

298  DF  LOW SPEED ASYNCHRONOUS DATA SYSTEM (E.G., TELETYPEWRITER SERVICE) {5}
299.~ Data switching exchange

DEFINITION

Classification: 370/299

Data switching exchange:

(under subclass 298) Subject matter including switching of input lines to selected output lines.