WESTINGHOUSE BRAKE AND SIGNAL HOLDINGS LIMITED

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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 224
 
  
 
B60T VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL 172

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6508519 Controlling a braking systemApr 06, 00Jan 21, 03[B60T]
5437422 Railway signalling systemFeb 09, 93Aug 01, 95[B61L]
5366183 Railway signalling systemFeb 01, 93Nov 22, 94[B61L]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5470034 Railway track circuitsExpiredMar 29, 94Nov 28, 95[B61L]
5440489 Regulating a railway vehicleExpiredJan 21, 93Aug 08, 95[G06F]
5330135 Railway track circuitsExpiredOct 16, 92Jul 19, 94[B61L]
5036478 Computing the length of a railway vehicle or a train of such vehiclesExpiredApr 13, 89Jul 30, 91[B61L, G06F]
5034681 Voltage detectionExpiredDec 06, 89Jul 23, 91[G01R]
5025195 Current monitoringExpiredDec 01, 89Jun 18, 91[G08B]
4909360 Brake equipmentExpiredApr 27, 89Mar 20, 90[F16D]
4895228 Slack adjusterExpiredJan 23, 89Jan 23, 90[F16D]
4875559 Tread brake unitExpiredJan 23, 89Oct 24, 89[F16D]

Top Inventors for This Owner

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