74438716
Sep 22, 1993
Dec 27, 1994
computer based facility access control system comprised of computer hardware, computer software for use in facilitating unattended computer network access control, computers, computer monitors, IO cards, and electrical controls; computerized data acquisition system for use collecting and distributing data comprised of computers, modems, data lines, and wireless units; wireless communication systems comprised of RF, microwave, and infra red transmitters and receivers and a speaker selection interface comprised of amplifiers, multiplexers, modems and telephones
Electrical and Scientific Apparatus