75081967
Apr 1, 1996
computerized electronic access controls and security management systems comprised of field controllers consisting of door interfaces; elevator interfaces and input/output interfaces, namely, key/card readers, electronically controlled window and door locks, electronic field alarms, door alarm contacts, window alarm contacts, passive infrared detectors, electric strikes, duress buttons, floor alarm contacts; and computer programs for use in connection therewith
Electrical and Scientific Apparatus