Assignee
UNION SWITCH & SIGNAL INC
US·87 granted patents·3 pending applications·2,717 citations·filing 1984–2006
Top patents by PatentIndex Score
90 records- 0196US5398894AVirtual block control system for railway vehicleUNION SWITCH & SIGNAL INC·Filed 1993·Granted Mar 21, 1995·224 cites·61 claims
- 0295US6087950ADetector for sensing motion and direction of a railway deviceUNION SWITCH & SIGNAL INC·Filed 1999·Granted Jul 11, 2000·124 cites·17 claims
- 0395US5332180ATraffic control system utilizing on-board vehicle information measurement apparatusUNION SWITCH & SIGNAL INC·Filed 1992·Granted Jul 26, 1994·188 cites·53 claims
- 0495US5330136ARailway coded track circuit apparatus and method utilizing fiber optic sensingUNION SWITCH & SIGNAL INC·Filed 1992·Granted Jul 19, 1994·103 cites·52 claims
- 0589US5529267ARailway structure hazard predictorUNION SWITCH & SIGNAL INC·Filed 1995·Granted Jun 25, 1996·81 cites·22 claims
- 0689US5465926ACoded track circuit repeater having standby modeUNION SWITCH & SIGNAL INC·Filed 1994·Granted Nov 14, 1995·65 cites·15 claims
- 0788US6032905ASystem for distributed automatic train supervision and controlUNION SWITCH & SIGNAL INC·Filed 1998·Granted Mar 7, 2000·104 cites·10 claims
- 0886US5263670ACab signalling system utilizing coded track circuit signalsUNION SWITCH & SIGNAL INC·Filed 1992·Granted Nov 23, 1993·52 cites·15 claims
- 0986US5109343AMethod and apparatus for verification of rail braking distancesUNION SWITCH & SIGNAL INC·Filed 1990·Granted Apr 28, 1992·77 cites·27 claims
- 1085US5823481AMethod of transferring control of a railway vehicle in a communication based signaling systemUNION SWITCH & SIGNAL INC·Filed 1996·Granted Oct 20, 1998·78 cites·36 claims
- 1184US6585194B1Modular point detector for railroad track switchUNION SWITCH & SIGNAL INC·Filed 2002·Granted Jul 1, 2003·49 cites·3 claims
- 1282US5676337ARailway car retarder systemUNION SWITCH & SIGNAL INC·Filed 1995·Granted Oct 14, 1997·65 cites·38 claims
- 1380US6296208B1Railway switch machine point detection systemUNION SWITCH & SIGNAL INC·Filed 1999·Granted Oct 2, 2001·39 cites·25 claims
- 1480US5145131AMaster-Satellite railway track circuitUNION SWITCH & SIGNAL INC·Filed 1991·Granted Sep 8, 1992·43 cites·40 claims
- 1579US7395140B2Geographic information system and method for monitoring dynamic train positionsUNION SWITCH & SIGNAL INC·Filed 2004·Granted Jul 1, 2008·61 cites·30 claims
- 1679US7296770B2Electronic vital relayUNION SWITCH & SIGNAL INC·Filed 2005·Granted Nov 20, 2007·16 cites·21 claims
- 1778US5785283ASystem and method for communicating operational status of a railway wayside to a locomotive cabUNION SWITCH & SIGNAL INC·Filed 1996·Granted Jul 28, 1998·54 cites·77 claims
- 1876US5507456AReduced harmonic switching mode apparatus and method for railroad vehicle signalingUNION SWITCH & SIGNAL INC·Filed 1995·Granted Apr 16, 1996·35 cites·8 claims
- 1976US5459663ACab signal apparatus and methodUNION SWITCH & SIGNAL INC·Filed 1993·Granted Oct 17, 1995·36 cites·13 claims
- 2076US5330134ARailway cab signalUNION SWITCH & SIGNAL INC·Filed 1992·Granted Jul 19, 1994·39 cites·18 claims
- 2174US6484974B1Controller for switch machineUNION SWITCH & SIGNAL INC·Filed 2001·Granted Nov 26, 2002·44 cites·40 claims
- 2274US5736923AApparatus and method for sensing motionlessness in a vehicleUNION SWITCH & SIGNAL INC·Filed 1995·Granted Apr 7, 1998·79 cites·12 claims
- 2373US6301610B1Communication systemUNION SWITCH & SIGNAL INC·Filed 2000·Granted Oct 9, 2001·30 cites·22 claims
- 2473US6259978B1Programmable relay driverUNION SWITCH & SIGNAL INC·Filed 1999·Granted Jul 10, 2001·43 cites·13 claims
- 2572US5561762AMalicious fault list generation methodUNION SWITCH & SIGNAL INC·Filed 1995·Granted Oct 1, 1996·78 cites·32 claims
- 2671US6366041B1Railway switch machine motor control apparatusUNION SWITCH & SIGNAL INC·Filed 2000·Granted Apr 2, 2002·20 cites·27 claims
- 2770US6149106ARailroad switch point position indicatorUNION SWITCH & SIGNAL INC·Filed 1998·Granted Nov 21, 2000·31 cites·15 claims
- 2870US6008731ADetector for sensing motion and direction of a railway vehicleUNION SWITCH & SIGNAL INC·Filed 1997·Granted Dec 28, 1999·28 cites·11 claims
- 2969US6300734B1Motor control apparatus for a railway switch machineUNION SWITCH & SIGNAL INC·Filed 2000·Granted Oct 9, 2001·18 cites·28 claims
- 3067US6097302ASystem and method for monitoring a plural segment light-emitting displayUNION SWITCH & SIGNAL INC·Filed 1999·Granted Aug 1, 2000·44 cites·21 claims
- 3165US6186448B1Captivity point detection system with single switch position targetUNION SWITCH & SIGNAL INC·Filed 1998·Granted Feb 13, 2001·26 cites·33 claims
- 3265US5333820ARailway vehicle wheel detector utilizing magnetic differential bridgeUNION SWITCH & SIGNAL INC·Filed 1993·Granted Aug 2, 1994·25 cites·16 claims
- 3365US5131269AClamp for railroad car couplerUNION SWITCH & SIGNAL INC·Filed 1984·Granted Jul 21, 1992·26 cites·33 claims
- 3464US7386391B2Dynamic optimizing traffic planning method and systemUNION SWITCH & SIGNAL INC·Filed 2003·Granted Jun 10, 2008·36 cites·94 claims
- 3563US7199883B1System and method for sensing position of a vehicleUNION SWITCH & SIGNAL INC·Filed 2005·Granted Apr 3, 2007·15 cites·20 claims
- 3663US5764162AMicropower impulse radar based wheel detectorUNION SWITCH & SIGNAL INC·Filed 1996·Granted Jun 9, 1998·59 cites·12 claims
- 3762US5502367AHighway crossing controlUNION SWITCH & SIGNAL INC·Filed 1994·Granted Mar 26, 1996·24 cites·10 claims
- 3862US5176350AEquipment mounting assembly for railroad car couplersUNION SWITCH & SIGNAL INC·Filed 1988·Granted Jan 5, 1993·19 cites·18 claims
- 3961US6439513B1Passive detection system for levitated vehicle or levitated vehicle systemUNION SWITCH & SIGNAL INC·Filed 2001·Granted Aug 27, 2002·20 cites·20 claims
- 4061US5501417ANoise cancellation in railway cab signalUNION SWITCH & SIGNAL INC·Filed 1995·Granted Mar 26, 1996·23 cites·20 claims
- 4160US6135665AClamp for railroad coupler headUNION SWITCH & SIGNAL INC·Filed 1997·Granted Oct 24, 2000·22 cites·20 claims
- 4260US6062514ARailway switch circuit controllerUNION SWITCH & SIGNAL INC·Filed 1998·Granted May 16, 2000·22 cites·26 claims
- 4360US5812102AVital monitoring system for seven-segment display used in railroad applicationsUNION SWITCH & SIGNAL INC·Filed 1997·Granted Sep 22, 1998·40 cites·20 claims
- 4460US5683148ABrake pipe pneumatic valveUNION SWITCH & SIGNAL INC·Filed 1995·Granted Nov 4, 1997·17 cites·27 claims
- 4557US6108220ASolid state fail-safe control of an AC load utilizing synchronous switchingUNION SWITCH & SIGNAL INC·Filed 1998·Granted Aug 22, 2000·19 cites·20 claims
- 4656US5922034AProgrammable relay driverUNION SWITCH & SIGNAL INC·Filed 1996·Granted Jul 13, 1999·22 cites·32 claims
- 4755US6494409B1Railway code following apparatusUNION SWITCH & SIGNAL INC·Filed 2002·Granted Dec 17, 2002·13 cites·21 claims
- 4855US6382567B2Railway switch machine point detection systemUNION SWITCH & SIGNAL INC·Filed 2001·Granted May 7, 2002·11 cites·21 claims
- 4954US6688559B1Modular point detector for railroad track switchUNION SWITCH & SIGNAL INC·Filed 2002·Granted Feb 10, 2004·9 cites·18 claims
- 5053US7168662B1Hollow tie railroad switching assemblyUNION SWITCH & SIGNAL INC·Filed 2003·Granted Jan 30, 2007·18 cites·18 claims
Showing the top 50 of 90 patent records by PatentIndex Score.
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