21 ELECTRONIC SECURITY PREMISE PROTECTION SYSTEMS, COMPRISING SOUND DETECTION AND SOUND ACTUATED CIRCUITS, FOR INTERCONNECTION BETWEEN A PROTECTED PREMISE AND A CENTRAL STATION
26 COMBINED DEMONSTRATOR AND SIMULATOR FOR DEMONSTRATING AND TESTING THE SECURITY SYSTEM
Trademark Events
Dec 14, 1992
Expired Sec. 9
Nov 7, 1977
Registered - Sec. 8 (6-Yr) Accepted & Sec. 15 Ack.