Institut Problem Modelirovania v Energetike Akademii Nauk

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5034943 Information storage deviceExpiredAug 12, 88Jul 23, 91[G11B, G01D]
5001667 Optical storage deviceExpiredAug 12, 88Mar 19, 91[G11C]
4875204 Method of erasing informationExpiredOct 06, 87Oct 17, 89[G11B]
4864555 Optical information carrier, method for erasing information therein, and optical storage device realizing this methodExpiredOct 06, 87Sep 05, 89[H04N, G11B, G01D]
4716273 Electric-arc trainer for weldersExpiredDec 30, 86Dec 29, 87[B23K]
4680014 Welder's trainerExpiredNov 26, 85Jul 14, 87[G09B]

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