NICHIA KAGAKU KOGYO KABUSHIKI KAISHA

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5386176 Cathode-ray tube containing an indium borate phosphorExpiredSep 27, 93Jan 31, 95[H01J]
5366834 Method of manufacturing a cathode ray tube phosphor screenExpiredMay 05, 93Nov 22, 94[G03C]
5229626 Solid-state image converting device with dot-like layerExpiredMar 27, 92Jul 20, 93[H01L]
5041334 Pigment-attached phosphorExpiredDec 19, 89Aug 20, 91[C09K, C08L]
4982314 Power source circuit apparatus for electro-luminescence deviceExpiredDec 04, 89Jan 01, 91[H02M, G05F]
4971739 Method of producing fluorapatite and a moisture sensitive resistor using fluorapatite obtained by the sameExpiredApr 12, 89Nov 20, 90[C04B, H01B, H01C]
4959174 Phosphor which emits light by the excitation of X-rayExpiredMar 16, 89Sep 25, 90[C09K]
4859903 Ultraviolet fluorescent lamp for accelerated exposure test on polymerExpiredMar 02, 88Aug 22, 89[H01J]
4855118 Method of producing fluorapatiteExpiredApr 12, 88Aug 08, 89[C01B]

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