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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 |
| 5483224 |
Security system and method for monitoring security in the vicinity of a location perimeter |
Jan. 9, 1996 |
| 5467074 |
Personal security system with transmitter test mode |
Nov. 14, 1995 |
| 5455567 |
Crane anti tractor lift system |
Oct. 3, 1995 |
| 5446445 |
Mobile detection system |
Aug. 29, 1995 |
| 5440292 |
Intrusion detector |
Aug. 8, 1995 |
| 5430433 |
Radio analog sensor |
Jul. 4, 1995 |
| 5422626 |
Electrical monitoring system |
Jun. 6, 1995 |
| 5416466 |
Personal security system with fixed testing transmitters |
May. 16, 1995 |
| 5406269 |
Method and apparatus for the remote verification of the operation of electronic devices by standard transmission mediums |
Apr. 11, 1995 |
| 5402106 |
Shopping cart theft prevention system |
Mar. 28, 1995 |
| 5402466 |
Home voice mail and paging system using an answering machine and a wide variety of alarms |
Mar. 28, 1995 |
| 5386209 |
Cluster alarm monitoring system |
Jan. 31, 1995 |
| 5382943 |
Remote monitoring unit |
Jan. 17, 1995 |
| 5381136 |
Remote data collection and monitoring system for distribution line |
Jan. 10, 1995 |
| 5365217 |
Personal security system apparatus and method |
Nov. 15, 1994 |
| 5335267 |
Apparatus and method for transmitting text data directly to a facsimile machine |
Aug. 2, 1994 |
| 5309144 |
Proximity sensing security system |
May. 3, 1994 |
| 5289534 |
Door ajar signalling device |
Feb. 22, 1994 |
| 5283549 |
Infrared sentry with voiced radio dispatched alarms |
Feb. 1, 1994 |
| 5278539 |
Alerting and warning system |
Jan. 11, 1994 |
| 5272465 |
Automatic alarm code converter |
Dec. 21, 1993 |
| 5264828 |
Personal security alarm system |
Nov. 23, 1993 |
| 5257007 |
Portable security system |
Oct. 26, 1993 |
| 5241300 |
SIDS detection apparatus and methods |
Aug. 31, 1993 |
| 5235320 |
Alarm system |
Aug. 10, 1993 |
| 5223816 |
Security and communication system with location detection |
Jun. 29, 1993 |
| 5223815 |
Portable anti-theft device |
Jun. 29, 1993 |
| 5202661 |
Method and system for fusing data from fixed and mobile security sensors |
Apr. 13, 1993 |
| 5191317 |
Low air warning system for scuba divers |
Mar. 2, 1993 |
| 5189395 |
Electronic house arrest system having officer safety reporting feature |
Feb. 23, 1993 |
| 5182543 |
Miniaturized data communication and identification system |
Jan. 26, 1993 |
| 5173932 |
Security system comprising a signal transmitter |
Dec. 22, 1992 |
| 5166664 |
Warning method and apparatus and parallel correlator particularly useful therein |
Nov. 24, 1992 |
| 5164704 |
System for transmitting alarm signals with a repetition |
Nov. 17, 1992 |
| 5162776 |
Emergency service apparatus and method |
Nov. 10, 1992 |
| 5154504 |
Communications and testing for emergency systems |
Oct. 13, 1992 |
| 5155469 |
Wireless alarm system |
Oct. 13, 1992 |
| 5150243 |
Method and apparatus for monitoring an optical network interface |
Sep. 22, 1992 |
| 5148148 |
Radio alarm system |
Sep. 15, 1992 |
| 5144285 |
Pulsed ultra sonic swimming pool alarm apparatus |
Sep. 1, 1992 |
| 5140308 |
Radio automatic alarm transfer system |
Aug. 18, 1992 |
| 5117217 |
Alarm system for sensing and vocally warning a person to step back from a protected object |
May. 26, 1992 |
| 5109399 |
Emergency call locating system |
Apr. 28, 1992 |
| 5109200 |
Electrically self-adjusting, compact and light-weight remote circuit tester |
Apr. 28, 1992 |
| 5103206 |
Security system |
Apr. 7, 1992 |
| 5103474 |
Drive-by personnel monitoring system with radio link |
Apr. 7, 1992 |
| 5095502 |
System for the detection and localization of defective lamps of an urban lighting network |
Mar. 10, 1992 |
| 5086290 |
Mobile perimeter monitoring system |
Feb. 4, 1992 |
| 5077547 |
Non contact programming for transmitter module |
Dec. 31, 1991 |
| 5070320 |
Alarm system |
Dec. 3, 1991 |
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