OPTEK TECHNOLOGY, INC.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2010/0252,722 Optical encoder assembly including collimating reflective surface featuresAbandonedJan 27, 10Oct 07, 10[G01D]
2009/0184,707 Electromagnetic barrier for use in association with inductive position sensorsAbandonedDec 01, 08Jul 23, 09[G01B]
2009/0091,313 Inductive position sensor with integrated led indicatorsAbandonedAug 29, 08Apr 09, 09[G01B, B60Q]
2008/0062,497 Optical Encoder Having Non-Collimated, Point-Source Light EmitterAbandonedSep 11, 06Mar 13, 08[G02B]
6717399 Magnetic sensing device with offset compensationExpiredJan 09, 02Apr 06, 04[G01B]
6356076 System for outputting a plurality of signals as a collective representation of incremental movements of an objectExpiredJul 15, 99Mar 12, 02[G01B]
6211670 Magnetic sensing device for outputting a digital signal as a dynamic representation of an analog signalExpiredDec 17, 98Apr 03, 01[H03K, G01P, G01R]
6067824 Automobile ignition security system using a differential magnetic comparatorExpiredOct 29, 98May 30, 00[B60R]
5491412 Security circuit with magnetic proximity sensor having a magnetic settable and electrical resettable latched outputExpiredJan 24, 94Feb 13, 96[H03K, G01N, G01R]
5121102 Programmable voltage source with isolation networkExpiredSep 13, 90Jun 09, 92[G08B, B60R]
4833406 Temperature compensated Hall-effect sensor apparatusExpiredApr 17, 86May 23, 89[H01L, G01N, A03K, G01R]
4737710 Hall-effect array for sensing second spatial derivative of magnetic fieldExpiredApr 08, 86Apr 12, 88[H03K, H01L, G01B]

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