ADT SECURITY SYSTEMS, INC.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4827247 Self-compensating projected-beam smoke detectorExpiredApr 13, 87May 02, 89[G08B]
4749871 Self-diagnostic projected-beam smoke detectorExpiredApr 13, 87Jun 07, 88[G08B]
4709151 Steerable mirror assembly and cooperative housing for a passive infrared intrusion detection systemExpiredOct 23, 85Nov 24, 87[G01J]
4707604 Ceiling mountable passive infrared intrusion detection systemExpiredOct 23, 85Nov 17, 87[G08B, G01J]
4687924 Modular transceiver with adjustable specular memberExpiredMay 08, 85Aug 18, 87[H01J]
4683459 Alarm system test annunciatorExpiredMay 28, 85Jul 28, 87[G08B]
4679881 Electrical interconnection apparatus and techniqueExpiredMay 07, 85Jul 14, 87[H01R]
D289638 Housing for an electronic push button dialerExpiredFeb 14, 84May 05, 87[]
4647913 Self-diagnostic ultrasonic intrusion detection systemExpiredJan 15, 85Mar 03, 87[G08B, G01S]
4644484 Stand-alone access control system clock controlExpiredMay 22, 84Feb 17, 87[H03K, G08B, G04B, G04F]
4636774 Variable sensitivity motion detectorExpiredNov 08, 83Jan 13, 87[G08B, G10K]
4634846 Multimode programmable stand-alone access control systemExpiredMay 22, 84Jan 06, 87[G06K]
4625115 Ceiling mountable passive infrared intrusion detection systemExpiredDec 11, 84Nov 25, 86[G01J]
4625199 Combination intrusion detector system having correlated ultrasonic and microwave detection sub-systemsExpiredJan 14, 85Nov 25, 86[G08B]
4622540 Security system status reportingExpiredMar 05, 84Nov 11, 86[G08B, H04Q]
4622546 Apparatus and method for displaying characters in a bit mapped graphics systemExpiredDec 23, 83Nov 11, 86[G09G]
4614968 Contrast smoke detectorExpiredFeb 16, 82Sep 30, 86[G08B, H04N]
4608674 Constant range ultrasonic motion detectorExpiredAug 06, 82Aug 26, 86[G08B]
4546344 Temperature compensated alarm systemExpiredMar 05, 84Oct 08, 85[G08B]
4544836 Optically-based access control systemExpiredDec 22, 82Oct 01, 85[G06K]

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