FUJI ELECTRIC CORPORATE RESEARCH AND DEVELOPMENT LTD., A CORP. OF JAPAN

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5061322 Method of producing p-type amorphous silicon carbide and solar cell including sameExpiredSep 18, 89Oct 29, 91[H01L]
4968384 Method of producing carbon-doped amorphous silicon thin filmExpiredSep 14, 89Nov 06, 90[H01L, C03C, B44C]
4875944 Amorphous photoelectric converting deviceExpiredSep 09, 88Oct 24, 89[H01C]
4768072 Multilayer semiconductor device having an amorphous carbon and silicon layerExpiredOct 02, 86Aug 30, 88[H01L]
4727559 Weighted event counting circuitExpiredJan 27, 86Feb 23, 88[G06M, G06F]
4692345 Method for gettering heavy metal from a silicon plateExpiredMay 20, 86Sep 08, 87[B05D]
4668084 Distance measuring equipmentExpiredJul 26, 84May 26, 87[G03B, G01C]
4659205 Automatic focusing apparatusExpiredApr 08, 83Apr 21, 87[G01J, G03B]
4658132 Rotational angle detecting device with full circumference illumination and detectionExpiredAug 24, 84Apr 14, 87[G01D]
4658133 Rotational angle detecting device with full circumference illumination and detectionExpiredAug 24, 84Apr 14, 87[G01D]
4658233 Strain gaugeExpiredMar 18, 85Apr 14, 87[G01L]
4652119 Range finderExpiredJan 18, 84Mar 24, 87[G03B, G01C]
4651004 Optical gas densitometerExpiredApr 26, 85Mar 17, 87[G01N]
4645955 Signal conversion circuit for photosensor arrayExpiredSep 28, 84Feb 24, 87[H03K]
4633319 Method and apparatus for detecting focusing in an image pickup deviceExpiredJul 19, 85Dec 30, 86[H04N]
4627991 Method for forming a protective film on a semiconductor bodyExpiredMay 16, 84Dec 09, 86[B05D]
4623596 Cell stack for fuel cellsExpiredJul 23, 85Nov 18, 86[H01M]
4618381 Method for adding impurities to semiconductor base materialExpiredMay 24, 84Oct 21, 86[H01J, H01L]
4611910 Range finderExpiredMay 04, 84Sep 16, 86[G03B, G01C]
4611224 Semiconductor radiation detectorExpiredAug 14, 84Sep 09, 86[H01L]

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