|
| US4032908 | 2 Jul 1975 | 28 Jun 1977 | Automated Systems, Inc. | Security alarm system |
| US4155075 | 20 Sep 1977 | 15 May 1979 | Robert Bosch GmbH | Remote control system for selective load switching, specifically for automotive vehicles |
| US4162488 | 11 Mar 1977 | 24 Jul 1979 | Emergency Products Corporation | Alarm system |
| US4223302 | 5 Mar 1979 | 16 Sep 1980 | Marvel Engineering Company | Conditions monitoring device |
| US4253087 | 8 Mar 1979 | 24 Feb 1981 | Nestar Systems Incorporated | Self-assigning address system |
| US4319229 | 9 Jun 1980 | 9 Mar 1982 | Firecom, Inc. | Alarm system having plural diverse detection means |
| US4342985 | 3 Oct 1980 | 3 Aug 1982 | Firecom, Inc. | Remote sensing and control system |
| US4375637 | 24 Feb 1981 | 1 Mar 1983 | Firecom, Inc. | Integrated alarm, security, building management, and communications system |
| US4665383 | 22 Apr 1985 | 12 May 1987 | Firecom, Inc. | Security system with monitoring and warning circuits |
| US4672374 | 20 Jun 1985 | 9 Jun 1987 | Firecom, Inc. | System for bilateral communication of a command station with remotely located sensors and actuators |
| US4815025 | 14 Nov 1985 | 21 Mar 1989 | Telefonaktiebolaget LM Ericsson | Arrangement for supervising a data processing system |
| US5432711 | 16 Oct 1992 | 11 Jul 1995 | Elcon Instruments, Inc. | Interface for use with a process instrumentation system |
| US5471527 | 2 Dec 1993 | 28 Nov 1995 | DSC Communications Corporation | Voice enhancement system and method |
| US6573831 | 26 Jun 2001 | 3 Jun 2003 | Sony Corporation | Status notification system, status notification apparatus, and response apparatus |