76032377
Apr 24, 2000
Feb 26, 2002
TELECOMMUNICATION DEVICES AND SYSTEMS, NAMELY AN ELECTRONIC CIRCUIT COUPLED TC A TELEPHONE LINE AND A TELEPHONE DEVICE TO HANG UP THE TELEPHONE DEVICE WHEN AN OFF-HOOK CONDITION IS DETECTED; CONFERENCE PHONES; FEATURE PHONES; CALLER IDENTIFICATION UNITS; AND AUTO DIALERS
Electrical and Scientific Apparatus