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Class Information
Number: 340/514
Name: Communications: electrical > Condition responsive indicating system > With particular system function (e.g., temperature compensation, calibration) > Testing
Description: Subject matter where the operativeness of the system is determined at discrete times.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 4138674 |
Four wire multi-satellite intrusion alarm control system with tamper switch |
Feb. 6, 1979 |
| 4137527 |
Liquid level sensing device |
Jan. 30, 1979 |
| 4137526 |
Alarm zone disabling control circuit |
Jan. 30, 1979 |
| 4134099 |
System for land seismic cable fault location |
Jan. 9, 1979 |
| 4103293 |
Intrusion alarm apparatus |
Jul. 25, 1978 |
| 4097850 |
Means for adjusting and for testing a detecting device |
Jun. 27, 1978 |
| 4095212 |
Remote electric state tester |
Jun. 13, 1978 |
| RE29580 |
Integrated fully supervised fire alarm system |
Mar. 14, 1978 |
| 4068105 |
Central station system transmission apparatus |
Jan. 10, 1978 |
| 4060803 |
Security alarm system with audio monitoring capability |
Nov. 29, 1977 |
| 4045794 |
Alarm indicating system |
Aug. 30, 1977 |
| 4044351 |
System monitor with innate line security ability |
Aug. 23, 1977 |
| 4042908 |
Apparatus for safety and detection of illuminating circuit |
Aug. 16, 1977 |
| 4032909 |
Arrangement for testing an alarm system and method |
Jun. 28, 1977 |
| 4024519 |
Intrusion alarm test system |
May. 17, 1977 |
| 4011554 |
Intrusion alarm apparatus |
Mar. 8, 1977 |
| 3991362 |
Technique for monitoring the operational integrity of remote analog circuits |
Nov. 9, 1976 |
| 3983548 |
Fire detection system |
Sep. 28, 1976 |
| 3978476 |
Circuit conduction test arrangement for emergency alarm systems |
Aug. 31, 1976 |
| 3974489 |
Centralized monitor and alarm system for monitoring remote areas with acoustical electric transducers |
Aug. 10, 1976 |
| 3970940 |
Overall equipment condition checking |
Jul. 20, 1976 |
| 3970929 |
Test apparatus for use with a heating system |
Jul. 20, 1976 |
| RE28915 |
Detection of products of combustion |
Jul. 20, 1976 |
| 3964036 |
Ionization smoke detector co-used to issue fire alarm and detect ambient atmosphere |
Jun. 15, 1976 |
| 3955183 |
Alarm condition sensing and indicating circuit with test capability |
May. 4, 1976 |
| 3946573 |
Electrical diagnostic system for refrigeration apparatus |
Mar. 30, 1976 |
| 3943499 |
Portable fire detector |
Mar. 9, 1976 |
| 3939398 |
Indicator lamp circuit having feedback protection |
Feb. 17, 1976 |
| 3932853 |
Apparatus for warning of the failure of a sump pump |
Jan. 13, 1976 |
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