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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 |
| 5786757 |
Load shed scheme for two wire data transmission |
Jul. 28, 1998 |
| 5774050 |
Radio alarm security system |
Jun. 30, 1998 |
| 5761206 |
Message packet protocol for communication of remote sensor information in a wireless security system |
Jun. 2, 1998 |
| 5754103 |
Transmission line-monitoring apparatus for use in a fire alarm system |
May. 19, 1998 |
| 5748078 |
Alarm alerting method and apparatus |
May. 5, 1998 |
| 5736927 |
Audio listen and voice security system |
Apr. 7, 1998 |
| 5729596 |
Security system |
Mar. 17, 1998 |
| 5726627 |
Security system with intermittent alarm location detection |
Mar. 10, 1998 |
| H1713 |
Remote alarm for personal intelligent communicators |
Mar. 3, 1998 |
| 5721530 |
Stand alone mode for alarm-type module |
Feb. 24, 1998 |
| 5719551 |
Vehicle security system for a vehicle having a data communications bus and related methods |
Feb. 17, 1998 |
| 5719622 |
Visual control selection of remote mechanisms |
Feb. 17, 1998 |
| 5717379 |
Remote monitoring system |
Feb. 10, 1998 |
| 5714931 |
Personalized security system |
Feb. 3, 1998 |
| 5714933 |
System for protection of goods against theft |
Feb. 3, 1998 |
| 5710648 |
Optical communication system and remote sensor interrogation |
Jan. 20, 1998 |
| 5708416 |
Wireless detection or control arrangement for escalator or moving walk |
Jan. 13, 1998 |
| 5695718 |
Automatic analyzer |
Dec. 9, 1997 |
| 5694114 |
Coherent alarm for a secure communication system |
Dec. 2, 1997 |
| 5689233 |
Emergency information offering system |
Nov. 18, 1997 |
| 5689235 |
Electronic security system |
Nov. 18, 1997 |
| 5686885 |
Sensor test method and apparatus |
Nov. 11, 1997 |
| 5680119 |
Vehicle responsive alert system |
Oct. 21, 1997 |
| 5677667 |
Data communications apparatus for tractor/trailer using pneumatic coupler |
Oct. 14, 1997 |
| 5666010 |
Safety system for machine tools |
Sep. 9, 1997 |
| 5661459 |
Proximity monitoring apparatus employing encoded, sequentially generated, mutually orthogonally polarized magnetic fields |
Aug. 26, 1997 |
| 5661471 |
Emergency alert system for a protected region employing RF and non-RF signalling |
Aug. 26, 1997 |
| 5654690 |
Fire alarm system |
Aug. 5, 1997 |
| 5640144 |
RF/ultrasonic separation distance alarm |
Jun. 17, 1997 |
| 5638046 |
Security system |
Jun. 10, 1997 |
| 5638047 |
Sound activated transmitter |
Jun. 10, 1997 |
| 5621383 |
Ring network system capable of detecting an alarm in each node |
Apr. 15, 1997 |
| 5619183 |
Video audio data remote system |
Apr. 8, 1997 |
| 5614886 |
Article removal alarm system for use with portable electronic device |
Mar. 25, 1997 |
| 5614883 |
Automotive opto-electric starter interlock |
Mar. 25, 1997 |
| 5612671 |
Method of learning tire pressure transmitter ID |
Mar. 18, 1997 |
| 5594428 |
Combination security unit |
Jan. 14, 1997 |
| 5589818 |
Personal response system with remotely adjustable microphone sensitivity |
Dec. 31, 1996 |
| 5587705 |
Multiple alert smoke detector |
Dec. 24, 1996 |
| 5578989 |
Personal security system with system wide testing |
Nov. 26, 1996 |
| 5576690 |
Combined audible and visual signaling device |
Nov. 19, 1996 |
| 5565844 |
Intrusion detector |
Oct. 15, 1996 |
| 5555454 |
Remote security light signal alert system |
Sep. 10, 1996 |
| 5552780 |
Method and apparatus for transmitting coded light through low transmissible materials |
Sep. 3, 1996 |
| 5543778 |
Security system |
Aug. 6, 1996 |
| 5537093 |
Electrooptical line module for transmitting in level-1 synchronous digital hierarchy with synchronizing unit |
Jul. 16, 1996 |
| 5530426 |
System and associated method for protecting valuable personal possessions |
Jun. 25, 1996 |
| 5525963 |
Apparatus for actuating a safety device |
Jun. 11, 1996 |
| 5521582 |
Alarm system |
May. 28, 1996 |
| 5500639 |
Satellite unit identification system |
Mar. 19, 1996 |
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