OPTRON INC.,

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4514727 Automatic brightness control apparatusExpiredJun 28, 82Apr 30, 85[G09G]
4268756 Optical transceiverExpiredNov 13, 78May 19, 81[G02B]
4241358 Radiation sensitive device with lateral currentExpiredMar 26, 79Dec 23, 80[H01B]
4190458 Metal-silica solution for forming films on semiconductor surfacesExpiredMar 27, 78Feb 26, 80[C09K]
4190767 Optical encoder apparatusExpiredJun 26, 78Feb 26, 80[G01D]
4182977 Constant output light emitting deviceExpiredJun 01, 78Jan 08, 80[H05B]

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