DISYS CORPORATION

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
D307874 Door/window intrusion detector transmitterExpiredNov 16, 87May 15, 90[]
4821027 Voice interactive security systemExpiredNov 16, 87Apr 11, 89[G08B, H04Q]
4803473 Transmitter coverExpiredJan 20, 88Feb 07, 89[G08B]
4801924 Transmitter programmer connect systemExpiredJan 20, 88Jan 31, 89[G08B]
4581606 Central monitor for home security systemExpiredAug 30, 82Apr 08, 86[F25D]
4238675 Optics for infrared intrusion detectorExpiredJun 14, 79Dec 09, 80[G01J]

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