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Class Information
Number: 340/531
Name: Communications: electrical > Condition responsive indicating system > With particular coupling link
Description: Subject matter having specific connecting means between the sensing and indicating means.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 4577184 |
Security system with randomly modulated probe signal |
Mar. 18, 1986 |
| 4577182 |
Alarm system |
Mar. 18, 1986 |
| 4575712 |
Communication system |
Mar. 11, 1986 |
| 4573041 |
Electric wiring system having a plurality of sensors |
Feb. 25, 1986 |
| 4570155 |
Smoke alarm activated light |
Feb. 11, 1986 |
| 4567472 |
Security-ensuring apparatus having an operational guidance function |
Jan. 28, 1986 |
| 4562428 |
Intrusion detector |
Dec. 31, 1985 |
| 4560978 |
Communication system and method |
Dec. 24, 1985 |
| 4559526 |
Security alarm system |
Dec. 17, 1985 |
| 4554532 |
Automatic receiver gain control in centralized monitor system |
Nov. 19, 1985 |
| 4550311 |
Remote sensing systems |
Oct. 29, 1985 |
| 4550312 |
Remote sensing systems |
Oct. 29, 1985 |
| 4539557 |
Combined communication, security and alarm radio system |
Sep. 3, 1985 |
| 4538138 |
Integrated security system having a multiprogrammed controller |
Aug. 27, 1985 |
| 4536749 |
Security-ensuring apparatus having an operational guidance function |
Aug. 20, 1985 |
| 4536747 |
Comprehensive intruder-environmental hazard detection, control, and action system |
Aug. 20, 1985 |
| 4536750 |
Car-directing apparatus for an alarm system |
Aug. 20, 1985 |
| 4535321 |
Method and system for monitoring faults in electrical circuits |
Aug. 13, 1985 |
| 4535324 |
Remote activated alarm triggering device |
Aug. 13, 1985 |
| 4531114 |
Intelligent fire safety system |
Jul. 23, 1985 |
| 4531115 |
Remote alarm system |
Jul. 23, 1985 |
| 4523186 |
Seal system with integral detector |
Jun. 11, 1985 |
| 4523184 |
Supervised wireless security system |
Jun. 11, 1985 |
| 4521767 |
Composite strip |
Jun. 4, 1985 |
| 4520349 |
Alarm system activated by buzzers |
May. 28, 1985 |
| 4514725 |
Window shade mounted alarm system |
Apr. 30, 1985 |
| 4514721 |
Multi-operation mode type of security-ensuring apparatus |
Apr. 30, 1985 |
| 4511886 |
Electronic security and surveillance system |
Apr. 16, 1985 |
| 4512033 |
Remote level adjustment system for use in a multi-terminal communications system |
Apr. 16, 1985 |
| 4502041 |
Structure failure detector with signal transmission through the structure itself |
Feb. 26, 1985 |
| 4499455 |
Alarm circuit interface units |
Feb. 12, 1985 |
| 4494111 |
Frequency agile security apparatus |
Jan. 15, 1985 |
| 4491830 |
Fire alarm system |
Jan. 1, 1985 |
| 4485374 |
Non-wired perimeter protective system |
Nov. 27, 1984 |
| 4477800 |
Security system |
Oct. 16, 1984 |
| 4477799 |
Security apparatus with alarm search and verification capability |
Oct. 16, 1984 |
| 4470039 |
Premise alarm shunt arrangement |
Sep. 4, 1984 |
| 4468664 |
Non-home run zoning system |
Aug. 28, 1984 |
| 4456903 |
Optical signal transmission system for an automotive vehicle |
Jun. 26, 1984 |
| 4450436 |
Acoustic alarm repeater system |
May. 22, 1984 |
| 4450434 |
Apparatus for determining break locations in fencing |
May. 22, 1984 |
| 4449247 |
Local orderwire facility for fiber optic communication system |
May. 15, 1984 |
| 4446454 |
Home security system |
May. 1, 1984 |
| 4432041 |
Smoke penetrating emergency light |
Feb. 14, 1984 |
| 4422066 |
Condition sensor interface means |
Dec. 20, 1983 |
| 4417235 |
Audible alarm network |
Nov. 22, 1983 |
| 4398184 |
Intrusion alarm system for buildings utilizing the building structure as a communications path for alarm signals or for security system activation signals |
Aug. 9, 1983 |
| 4396910 |
Coded security switch |
Aug. 2, 1983 |
| 4390870 |
Interface circuit for brush wear indicator application |
Jun. 28, 1983 |
| 4389639 |
Voice warning device using entertainment speaker |
Jun. 21, 1983 |
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