AEG WESTINGHOUSE TRANSPORTATION SYSTEMS, INC.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B61L GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC 125
 
  
 
G06F ELECTRIC DIGITAL DATA PROCESSING 1446
 
  
 
G08B SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS 193
 
  
 
H03H IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS 170

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5463552 Rules-based interlocking engine using virtual gatesJul 30, 92Oct 31, 95[B61L, G06F]
RE30394 Signal bandpass filter apparatusApr 04, 78Sep 02, 80[G08B, H03H]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5353413 Method and apparatus for christening a trainline monitor systemExpiredMar 19, 92Oct 04, 94[G06F]
5323014 Optocoupler built-in self test for applications requiring isolationExpiredMar 01, 93Jun 21, 94[G02B]
5317751 Method and apparatus for placing a trainline monitor system in a layup modeExpiredMar 18, 92May 31, 94[G06F]
5293632 Method and apparatus for load shedding using a trainline monitor systemExpiredMar 18, 92Mar 08, 94[G06F]
5289176 Multi-master resolution of a serial busExpiredMar 19, 92Feb 22, 94[G05B]
5255208 On-line processor based diagnostic systemExpiredAug 08, 91Oct 19, 93[G06F]
5116262 Mounting system for electrical devicesExpiredJun 04, 90May 26, 92[H02B]
5057760 Torque determination for control of an induction motor apparatusExpiredNov 03, 86Oct 15, 91[H02P]
5009148 Vehicle air exchange according to passenger loadExpiredDec 01, 89Apr 23, 91[B61D]
4841975 Preoperative planning of bone cuts and joint replacement using radiant energy scan imagingExpiredApr 15, 87Jun 27, 89[A61B]
4774669 Train control having a supervisory monitor providing improved operating safety and better maintenance supportExpiredJun 19, 86Sep 27, 88[G06F]
4710880 Vehicle speed control apparatus and methodExpiredNov 28, 84Dec 01, 87[B61L, G06F]
4697130 Induction motor regenerative brake control apparatus and methodExpiredDec 22, 86Sep 29, 87[H02P]
4695783 Induction motor control apparatus and methodExpiredOct 22, 85Sep 22, 87[H02P]
4684868 Induction motor control apparatus and method for restart when rotating in shutdownExpiredOct 30, 85Aug 04, 87[H02P]
4673859 Induction motor synthesis control apparatus and methodExpiredJan 31, 85Jun 16, 87[H02P]
4623269 Wheel bearing protection apparatusExpiredJul 22, 85Nov 18, 86[F16C]
4551944 Door control apparatusExpiredJan 17, 84Nov 12, 85[E05F]
4511832 Stepper motor door control apparatus and methodExpiredMar 19, 84Apr 16, 85[H02K]
4480298 Multiple output DC-to-DC voltage converter apparatusExpiredJan 25, 83Oct 30, 84[H02M]

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