General Railway Signal Corporation

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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 422
 
  
 
E01B PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS 319
 
  
 
G06F ELECTRIC DIGITAL DATA PROCESSING 3444
 
  
 
G08B SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS 292
 
  
 
H01R ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS 1132

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6009554 Systems safety vital arbiter employing numerical techniquesSep 19, 97Dec 28, 99[G06F]
5919237 Vital serial linkDec 03, 96Jul 06, 99[G06F]
5867801 Remote asset monitoring systemJan 11, 96Feb 02, 99[G06F]
5633628 Wheelset monitoring systemJan 03, 96May 27, 97[G08B]
5590857 Trailing device for a railroad switch layoutAug 19, 94Jan 07, 97[E01B]
5586737 Switch machine cam barMar 28, 96Dec 24, 96[E01B]
5504405 Switch machine controller with fail safe mechanismAug 19, 94Apr 02, 96[H01R]
5494242 Low profile switch machine with hand throw or motor throw selector deviceAug 19, 94Feb 27, 96[E01B]
5438322 Thermal sensor for detection of potential mechanical failures and transmission of temperature warning signalsJun 09, 94Aug 01, 95[G08B]
5364047 Automatic vehicle control and location systemApr 02, 93Nov 15, 94[B61L]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5669587 Point detection and indication with latch out meansExpiredFeb 16, 96Sep 23, 97[E01B]
5671348 Non-vital turn off of vital output circuitExpiredJun 06, 95Sep 23, 97[B61L, G06F]
5582370 Switch machine with ratchet mechanism on hand throw mechanismExpiredAug 19, 94Dec 10, 96[B61L]
5433166 Railway light signalExpiredMay 12, 94Jul 18, 95[B61L, F21V]
5356098 Communication system for transmitting RF signals representative of defects or hazards in a railway system having frangible glass activationExpiredJul 15, 93Oct 18, 94[B61L]
5256973 Relay tester having a circuit to sense the voltage spihe caused by the armature movementExpiredJun 28, 91Oct 26, 93[G01R]
5092544 Highway crossing control system for railroads utilizing a communications link between the train locomotive and the crossing protection equipmentExpiredDec 22, 89Mar 03, 92[B61L]

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