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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 |
| 4518952 |
Sensor test circuit of an alarm system |
May. 21, 1985 |
| 4517554 |
Method and apparatus for inspecting a danger alarm system |
May. 14, 1985 |
| 4511887 |
Long range wireless alarm monitoring system |
Apr. 16, 1985 |
| 4507702 |
Relay controlled load |
Mar. 26, 1985 |
| 4506255 |
Operation test circuit for fire detectors |
Mar. 19, 1985 |
| 4498074 |
Selectively testable fire detector |
Feb. 5, 1985 |
| 4489312 |
Selective test circuit for fire detectors |
Dec. 18, 1984 |
| 4482889 |
Device for detecting failure of ultrasonic apparatus |
Nov. 13, 1984 |
| 4470039 |
Premise alarm shunt arrangement |
Sep. 4, 1984 |
| 4467314 |
Electric utility communication system with field installation terminal and load management terminal with remotely assignable unique address |
Aug. 21, 1984 |
| 4456907 |
Ionization type smoke detector with test circuit |
Jun. 26, 1984 |
| 4441100 |
Electrical circuits |
Apr. 3, 1984 |
| 4437056 |
Cab signal test set for automatically testing the pickup coils and checking an amplifier of cab signal equipment |
Mar. 13, 1984 |
| 4426851 |
Ice maker diagnostic system |
Jan. 24, 1984 |
| 4422068 |
Intrusion alarm system for preventing actual confrontation with an intruder |
Dec. 20, 1983 |
| 4418312 |
Apparatus for testing multi-conductor cables |
Nov. 29, 1983 |
| 4414539 |
Built-in passive fault detection circuitry for an aircraft's electrical/electronic systems |
Nov. 8, 1983 |
| 4412211 |
System for test sequence annunciation |
Oct. 25, 1983 |
| 4400694 |
Microprocessor base for monitor/control of communications facilities |
Aug. 23, 1983 |
| 4398183 |
Detecting method and apparatus for permanent wave hairdressing |
Aug. 9, 1983 |
| 4396910 |
Coded security switch |
Aug. 2, 1983 |
| 4385289 |
Trailer temperature sensing alarm for refrigerated trucks |
May. 24, 1983 |
| 4354180 |
Electro-optical liquid level sensor |
Oct. 12, 1982 |
| 4351394 |
Method and system for aircraft fire protection |
Sep. 28, 1982 |
| 4329643 |
Portable circuit testing system |
May. 11, 1982 |
| 4322847 |
Automatic indirect testing to verify operational control |
Mar. 30, 1982 |
| 4321591 |
Portable, self-powered multiple warning device |
Mar. 23, 1982 |
| 4321579 |
Circuit arrangement for monitoring operating functions in motor vehicles |
Mar. 23, 1982 |
| 4309695 |
Electronic alarm circuit |
Jan. 5, 1982 |
| 4307335 |
Open thermocouple tester system |
Dec. 22, 1981 |
| 4281717 |
Expolosion suppression system for fire or expolosion susceptible enclosures |
Aug. 4, 1981 |
| 4273961 |
Apparatus for communicating with processing apparatus over a telephone network |
Jun. 16, 1981 |
| 4274087 |
Annunciator monitor circuit |
Jun. 16, 1981 |
| 4270121 |
Circuitry for burglar alarm annunciator |
May. 26, 1981 |
| 4267553 |
Method and apparatus for securing attache cases |
May. 12, 1981 |
| 4262283 |
System for transmitting alarm information over telephone lines |
Apr. 14, 1981 |
| 4249170 |
Annunciator |
Feb. 3, 1981 |
| 4246566 |
Malfunction diagnosing apparatus for electronic control system for vehicles |
Jan. 20, 1981 |
| 4242672 |
Patient monitoring system and switch |
Dec. 30, 1980 |
| 4224606 |
Fluid level detector test switch |
Sep. 23, 1980 |
| 4224466 |
Combined data input and test circuit |
Sep. 23, 1980 |
| 4223306 |
Device for detection of short circuits in industrial uses |
Sep. 16, 1980 |
| 4214227 |
Instrument panel assembly |
Jul. 22, 1980 |
| 4206450 |
Fire and intrusion security system |
Jun. 3, 1980 |
| 4201982 |
Four wire multi-satellite intrusion alarm with multiplex annunciation |
May. 6, 1980 |
| 4176348 |
Electronic security device |
Nov. 27, 1979 |
| 4170004 |
Device for monitoring the serviceability of optical indicators |
Oct. 2, 1979 |
| 4162478 |
Circuit arrangement for testing operating and/or capacity conditions in automotive vehicles |
Jul. 24, 1979 |
| 4158197 |
Pendant with an alarm built in |
Jun. 12, 1979 |
| 4156864 |
Pressure switch checking device for locomotives |
May. 29, 1979 |
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