Siemens Nixdorf Information Systems, Inc.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4542528 OCR and bar code reader with optimized sensorExpiredNov 06, 84Sep 17, 85[G06K]
4491964 Image processing integrated circuitExpiredMar 09, 84Jan 01, 85[G06K]
4396902 OCR/Variable head slot readerExpiredJul 07, 80Aug 02, 83[G06K]
4386433 Character doubling eliminatorExpiredMar 24, 81May 31, 83[G06K]
4317029 Optics frame assemblyExpiredJul 08, 80Feb 23, 82[G06K]
4288690 Illumination systemExpiredOct 29, 79Sep 08, 81[H01J]

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