75879983
Dec 20, 1999
Nov 25, 2003
ELECTRONIC IDENTIFICATION SYSTEMS, NAMELY, SHORT, MEDIUM AND LONG RANGE RADIO FREQUENCY PROXIMITY CONTROLLERS, READERS AND WRITERS FOR ELECTRONIC ACCESS, INVENTORY AND QUALITY CONTROL, IDENTIFICATION, TRACKING, AND TIME AND ATTENDANCE KEEPING; AND FOR TRANSPONDERS USED WITH RADIO FREQUENCY PROXIMITY READERS AND WRITERS
Electrical and Scientific Apparatus