| |
 |
|
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 |
| 5061917 |
Electronic warning apparatus |
Oct. 29, 1991 |
| 5055823 |
Portable anti-theft alarm and locking device for vehicles |
Oct. 8, 1991 |
| 5049867 |
Vehicle security apparatus |
Sep. 17, 1991 |
| 5045839 |
Personnel monitoring man-down alarm and location system |
Sep. 3, 1991 |
| 5039980 |
Multi-nodal communication network with coordinated responsibility for global functions by the nodes |
Aug. 13, 1991 |
| 5036310 |
Remote mail delivery reporting system triggered by predetermined mail in a mailbox |
Jul. 30, 1991 |
| 5032823 |
Secure personnel monitoring system |
Jul. 16, 1991 |
| 5028911 |
Acoustically responsive portable emergency light |
Jul. 2, 1991 |
| 5029290 |
Emergency alert system |
Jul. 2, 1991 |
| 5019805 |
Smoke detector with strobed visual alarm and remote alarm coupling |
May. 28, 1991 |
| 5019802 |
Intrusion detection apparatus |
May. 28, 1991 |
| 5012223 |
Sound activated device and method |
Apr. 30, 1991 |
| 5004999 |
Extended RF range alarm system |
Apr. 2, 1991 |
| 5003294 |
Remote infra-red personal alarm system |
Mar. 26, 1991 |
| 4999607 |
Monitoring system with improved alerting and locating |
Mar. 12, 1991 |
| 4996517 |
Household alarm system |
Feb. 26, 1991 |
| 4994787 |
Remote intrusion alarm condition advisory system |
Feb. 19, 1991 |
| 4987402 |
Alarm system for sensing and vocally warning of an unauthorized approach towards a protected object or zone |
Jan. 22, 1991 |
| 4972176 |
Polymeric security window with an integrated intrusion detector |
Nov. 20, 1990 |
| 4956634 |
City tie line connection for fire alarm system |
Sep. 11, 1990 |
| 4951029 |
Micro-programmable security system |
Aug. 21, 1990 |
| 4943799 |
Portable alarm system with sealed enclosure |
Jul. 24, 1990 |
| 4933667 |
Graphic annunciator |
Jun. 12, 1990 |
| 4926162 |
High security communication line monitor |
May. 15, 1990 |
| 4908602 |
Apparatus and method of testing a portable held button for emergency response system |
Mar. 13, 1990 |
| 4908604 |
Remotely controlled security system |
Mar. 13, 1990 |
| 4899131 |
Local control system for domestic appliances and alarm devices |
Feb. 6, 1990 |
| 4897630 |
Programmable alarm system having proximity detection with vocal alarm and reporting features |
Jan. 30, 1990 |
| 4897862 |
Acoustic alarm detection system for telephone activation |
Jan. 30, 1990 |
| 4884060 |
Multi-state selection switch for a personal emergency response system |
Nov. 28, 1989 |
| 4884059 |
Apparatus and method for reporting verification testing of a personal emergency response system |
Nov. 28, 1989 |
| 4881060 |
Fire alarm system |
Nov. 14, 1989 |
| 4871997 |
Proximity sensor apparatus |
Oct. 3, 1989 |
| 4864277 |
Radio alarm system |
Sep. 5, 1989 |
| 4859990 |
Electrically programmable transceiver security system and integrated circuit |
Aug. 22, 1989 |
| 4855713 |
Learn mode transmitter |
Aug. 8, 1989 |
| 4847593 |
Transmission circuit of fire protection/security system |
Jul. 11, 1989 |
| 4837556 |
Signal transmission device |
Jun. 6, 1989 |
| 4833449 |
Home security system |
May. 23, 1989 |
| 4825204 |
Address setting and data transmission system |
Apr. 25, 1989 |
| 4825196 |
Signal transmission circuit of fire/security protection system |
Apr. 25, 1989 |
| 4821027 |
Voice interactive security system |
Apr. 11, 1989 |
| 4818975 |
Generator stator core temperature monitor |
Apr. 4, 1989 |
| 4813759 |
Fiber optic high and low level alarms |
Mar. 21, 1989 |
| 4812810 |
Fiber optic door sensor for a domestic appliance |
Mar. 14, 1989 |
| 4812820 |
Electronic surveillance system and transceiver unit therefor |
Mar. 14, 1989 |
| 4808973 |
Window tape alarm interlock device |
Feb. 28, 1989 |
| RE32856 |
Alarm system |
Feb. 7, 1989 |
| 4801924 |
Transmitter programmer connect system |
Jan. 31, 1989 |
| 4792796 |
Electronic alarm apparatus |
Dec. 20, 1988 |
|
|
|
