73450892
Nov 2, 1983
May 26, 1987
COMMUNICATION HARDWARE-NAMELY, MULTIPLEXERS, CONCENTRATORS, ENCRYPTION UNITS, NETWORK CONTROLLERS, MODEMS, TERMINATORS AND INTERFACE CIRCUITS; INPUT/OUTPUT TERMINALS; ACCESS CONTROL UNITS; MEMORIES; AND PARTS THEREFOR, AND PRE-RECORDED COMPUTER PROGRAMS FOR USE THEREWITH
Electrical and Scientific Apparatus