Digital Appliance Controls, Inc.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5267120 Relay control apparatusExpiredMay 04, 87Nov 30, 93[H01F]
5123018 Micropressor monitoring and resetting circuitExpiredDec 05, 89Jun 16, 92[G06F]
5055962 Relay actuation circuitryExpiredFeb 21, 89Oct 08, 91[H01H]
5042017 Rotary pulse switchExpiredJan 16, 90Aug 20, 91[G04B, H01H]
4941160 Frequency multiplier circuitry and methodExpiredMar 31, 89Jul 10, 90[H03K]
4819237 Method and apparatus for monitoring the validity of microprocess or volatile memoryExpiredAug 05, 87Apr 04, 89[G06F]
4787008 Electronic latch circuitryExpiredMar 09, 87Nov 22, 88[H05B]
4672233 Controller with dual function switchExpiredJun 24, 85Jun 09, 87[H03K]
4467423 Method and system for controlling an apparatusExpiredNov 02, 81Aug 21, 84[G05B, G06F]
4418339 Temperature sensing circuit for semiconductor junction temperature probeExpiredJun 09, 80Nov 29, 83[G08B, G01K]
4365289 Method and control system for controlling apparatusExpiredFeb 04, 80Dec 21, 82[G05B, G06F]
4339649 Apparatus and method for R-C time constant circuitExpiredJun 03, 80Jul 13, 82[H05B]
4323861 Oscillator circuit for controlling the power level of a microwave ovenExpiredMar 29, 79Apr 06, 82[H03K, H05B]
4322631 Implemental means for a touch control systemExpiredNov 23, 79Mar 30, 82[H01H]
4318084 Control system for appliances and the likeExpiredDec 03, 79Mar 02, 82[H01H]
4314197 Alternating current power control circuitExpiredMar 29, 79Feb 02, 82[G05F]
4305122 Method and system for controlling a dishwashing apparatusExpiredFeb 05, 80Dec 08, 81[G05B, G06F]
4290004 Voltage regulator circuitExpiredFeb 04, 80Sep 15, 81[G05F]
4245296 Means and method for controlling the operation of an appliance and the likeExpiredDec 11, 78Jan 13, 81[G05B, G06F, H01H]
4225896 Crest firing meansExpiredMar 13, 78Sep 30, 80[H02H]

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