Fujitsu Fanuc Limited

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5334924 Induction motor control systemExpiredOct 30, 81Aug 02, 94[H02P]
4745320 Induction motorExpiredJun 24, 82May 17, 88[H02K]
4675490 Method and apparatus for controlling electrode position in an electric discharge machine by counting feedback pulses and repeatedly adding the countExpiredJun 23, 82Jun 23, 87[G05B, B23H]
4591771 Numerical control systemExpiredJun 18, 82May 27, 86[G05B]
4575667 AC Motor speed control apparatusExpiredJun 07, 82Mar 11, 86[H02P]
4571687 Screw cutting control systemExpiredJun 14, 82Feb 18, 86[G06F]
4542471 Robot control system for presetting limit values corresponding to limits of deviationExpiredDec 28, 81Sep 17, 85[G05B]
4538639 Robot wrist of an industrial robotExpiredJun 23, 82Sep 03, 85[F16L]
4530636 Device for operating a hand of an industrial robotExpiredJun 04, 82Jul 23, 85[B25J]
4530062 Method and apparatus for controlling industrial robotsExpiredMay 28, 82Jul 16, 85[G05B, G06F]
4518916 System for detecting rotational speedExpiredJun 23, 82May 21, 85[G01P]
4519026 Numerical control system with graphical display processing of size and shape of part contourExpiredJun 21, 82May 21, 85[G05B]
4517663 Method of rewriting data in non-volatile memory, and system thereforExpiredDec 22, 83May 14, 85[G11C]
4516211 Numerical control systemExpiredJun 18, 82May 07, 85[G05B, G06F]
4514813 System for correcting positional error in numerical control devicesExpiredSep 25, 81Apr 30, 85[G05B, G06F]
4513234 Method and apparatus for controlling zero-point return of a movable elementExpiredJun 16, 82Apr 23, 85[G05B]
4511975 Numerical control machine toolExpiredMay 21, 82Apr 16, 85[G05B, G06F]
4511982 Numerical control deviceExpiredMar 05, 82Apr 16, 85[G06F]
4506129 Apparatus for processing a broken wire electrode used during electro-discharge machiningExpiredJun 07, 82Mar 19, 85[B23P]
4506331 Numerical control methodExpiredJun 18, 82Mar 19, 85[G05B, G06F]

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