Elevator GmbH

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4797675 Procedure for counting moving objects as they stopExpiredApr 23, 87Jan 10, 89[G01S]
4784372 Traction sheaveExpiredAug 13, 87Nov 15, 88[B66D]
4771197 Frequency converter-controlled squirrel cage motorExpiredMay 07, 82Sep 13, 88[H02K]
4742893 Signalling procedure for a lift and a signalling systemExpiredApr 15, 86May 10, 88[B66B]
4742549 Procedure for watching over the area in front of a liftExpiredOct 04, 85May 03, 88[G06K]
4689510 Electric motor and flywheel for operation while immersed in a liquidExpiredMay 28, 86Aug 25, 87[H02K, F04F, F01D]
4689512 Electric motorExpiredMay 28, 86Aug 25, 87[H02K]
4687110 Apparatus for angularly displacing a loadExpiredSep 02, 86Aug 18, 87[B66C]
4684856 Method and drive for elevator DC drive motor stabilizationExpiredAug 06, 84Aug 04, 87[H02P, B66C]
4679032 Procedure and means for producing a contrast imageExpiredDec 05, 84Jul 07, 87[G08B]
4673066 Brake in a light-constructed transport carriageExpiredFeb 20, 86Jun 16, 87[F16D]
4673326 Bridge and stopper mechanism for an apparatus for lateral transfer of roller palletsExpiredMay 24, 85Jun 16, 87[B65G]
4672277 Elevator motor controlExpiredDec 10, 84Jun 09, 87[B66B]
4663700 Way of placing chokes with air coreExpiredSep 23, 86May 05, 87[H02M]
4653612 Speed limiter for lifts provided with catch deviceExpiredDec 17, 84Mar 31, 87[B66B]
4640459 Dual rails for roller palletsExpiredDec 26, 84Feb 03, 87[E01B]
4638610 Theatrical stageExpiredSep 23, 85Jan 27, 87[E04H]
4635320 Floor selector for liftExpiredMar 11, 85Jan 13, 87[B66B]
4621222 Method for improving the dynamic converter drive for a direct current elevator motorExpiredJul 25, 85Nov 04, 86[H02P]
4583167 Procedure and apparatus for conveying external and output data to a processor systemExpiredJun 05, 84Apr 15, 86[G06F]

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