Kollmorgen Technologies Corporation

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4853604 Position and speed sensorsExpiredJan 26, 88Aug 01, 89[G05B]
4797592 Dynamo electric machine with upwardly shifted ripple frequencyExpiredJun 17, 82Jan 10, 89[H02K]
4763056 Power supply systems for reluctance motorsExpiredJan 07, 86Aug 09, 88[H02P]
4763057 Control for improving induction transient response by excitation angle controlExpiredJul 08, 87Aug 09, 88[H02P]
4737698 Position and speed sensorsExpiredOct 18, 85Apr 12, 88[G05B]
4733149 Adaptive control systemExpiredMay 31, 85Mar 22, 88[G05B]
4712005 Floating mask encoder with assembly spacerExpiredDec 19, 85Dec 08, 87[G01D]
4709199 Velocity feedback control of step motorsExpiredJun 25, 85Nov 24, 87[H02P]
4703243 Stepping motor harmonic suppressionExpiredApr 17, 86Oct 27, 87[H02P]
4698537 Electrical drive systems incorporating variable reluctance motorsExpiredJan 07, 86Oct 06, 87[H02K]
4686437 Electromechanical energy conversion systemExpiredSep 17, 86Aug 11, 87[H02K]
4682093 Power supply systems for inductive elementsExpiredOct 18, 85Jul 21, 87[H02P]
4675547 High power transistor base drive circuitExpiredMar 28, 85Jun 23, 87[H03K]
4671465 Method and apparatus for winding slotted armaturesExpiredMar 20, 85Jun 09, 87[H02K]
4670696 Variable speed variable reluctance electrical machinesExpiredOct 18, 85Jun 02, 87[H02K, H02P]
4661756 Servomotor control systemsExpiredOct 18, 85Apr 28, 87[H02K, H02P]
4647824 Output voltage control for a DC servo amplifierExpiredApr 19, 85Mar 03, 87[H02P]
4645997 Transient free solid state automatic power factor correctionExpiredMar 13, 85Feb 24, 87[H02J, G05F]
4644199 Linear DC permanent magnet motorExpiredMar 22, 85Feb 17, 87[H02K]
4633151 Series connected transistor protection circuitExpiredOct 24, 84Dec 30, 86[H02K]

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