Assignee
QUANTUM ENGINEERING INC
US·29 granted patents·6 pending applications·1,814 citations·filing 1990–2009
Top patents by PatentIndex Score
35 records- 0199US7092801B2Train control system and method of controlling a train or trainsQUANTUM ENGINEERING INC·Filed 2006·Granted Aug 15, 2006·67 cites·20 claims
- 0299US7079926B2Train control system and method of controlling a train or trainsQUANTUM ENGINEERING INC·Filed 2005·Granted Jul 18, 2006·84 cites·21 claims
- 0399US7024289B2Train control system and method of controlling a train or trainsQUANTUM ENGINEERING INC·Filed 2005·Granted Apr 4, 2006·64 cites·25 claims
- 0498US6865454B2Train control system and method of controlling a train or trainsQUANTUM ENGINEERING INC·Filed 2002·Granted Mar 8, 2005·127 cites·4 claims
- 0597US7467032B2Method and system for automatically locating end of train devicesQUANTUM ENGINEERING INC·Filed 2006·Granted Dec 16, 2008·52 cites·7 claims
- 0697US7092800B2Lifting restrictive signaling in a blockQUANTUM ENGINEERING INC·Filed 2005·Granted Aug 15, 2006·54 cites·18 claims
- 0795US6996461B2Method and system for ensuring that a train does not pass an improperly configured deviceQUANTUM ENGINEERING INC·Filed 2002·Granted Feb 7, 2006·117 cites·66 claims
- 0895US6845953B2Method and system for checking track integrityQUANTUM ENGINEERING INC·Filed 2002·Granted Jan 25, 2005·113 cites·71 claims
- 0995US6112142APositive signal comparator and methodQUANTUM ENGINEERING INC·Filed 1998·Granted Aug 29, 2000·102 cites·30 claims
- 1094US6609049B1Method and system for automatically activating a warning device on a trainQUANTUM ENGINEERING INC·Filed 2002·Granted Aug 19, 2003·105 cites·20 claims
- 1193US7200471B2Train control system and method of controlling a train or trainsQUANTUM ENGINEERING INC·Filed 2006·Granted Apr 3, 2007·25 cites·30 claims
- 1293US6957131B2Positive signal comparator and methodQUANTUM ENGINEERING INC·Filed 2002·Granted Oct 18, 2005·97 cites·53 claims
- 1393US6863246B2Method and system for automated fault reportingQUANTUM ENGINEERING INC·Filed 2002·Granted Mar 8, 2005·111 cites·36 claims
- 1493US6824110B2Method and system for automatically activating a warning device on a trainQUANTUM ENGINEERING INC·Filed 2003·Granted Nov 30, 2004·90 cites·20 claims
- 1592US6903658B2Method and system for ensuring that a train operator remains alert during operation of the trainQUANTUM ENGINEERING INC·Filed 2003·Granted Jun 7, 2005·103 cites·45 claims
- 1692US6853888B2Lifting restrictive signaling in a blockQUANTUM ENGINEERING INC·Filed 2003·Granted Feb 8, 2005·89 cites·18 claims
- 1791US7036774B2Method and system for checking track integrityQUANTUM ENGINEERING INC·Filed 2004·Granted May 2, 2006·81 cites·48 claims
- 1891US6978195B2Train control system and method of controlling a train or trainsQUANTUM ENGINEERING INC·Filed 2004·Granted Dec 20, 2005·57 cites·4 claims
- 1990US6915191B2Method and system for detecting when an end of train has passed a pointQUANTUM ENGINEERING INC·Filed 2003·Granted Jul 5, 2005·88 cites·49 claims
- 2088US7593795B2Method and system for compensating for wheel wear on a trainQUANTUM ENGINEERING INC·Filed 2006·Granted Sep 22, 2009·18 cites·16 claims
- 2184US7236860B2Method and system for ensuring that a train does not pass an improperly configured deviceQUANTUM ENGINEERING INC·Filed 2005·Granted Jun 26, 2007·17 cites·29 claims
- 2278US7142982B2System and method for determining relative differential positioning system measurement solutionsQUANTUM ENGINEERING INC·Filed 2004·Granted Nov 28, 2006·35 cites·22 claims
- 2378US7139646B2Train control system and method of controlling a train or trainsQUANTUM ENGINEERING INC·Filed 2005·Granted Nov 21, 2006·8 cites·15 claims
- 2478US7096096B2Method and system for automatically locating end of train devicesQUANTUM ENGINEERING INC·Filed 2003·Granted Aug 22, 2006·33 cites·44 claims
- 2568US6701228B2Method and system for compensating for wheel wear on a trainQUANTUM ENGINEERING INC·Filed 2002·Granted Mar 2, 2004·28 cites·60 claims
- 2665US6588966B2End of train coupler mounting deviceQUANTUM ENGINEERING INC·Filed 2002·Granted Jul 8, 2003·10 cites·31 claims
- 2763US7283897B2Method and system for compensating for wheel wear on a trainQUANTUM ENGINEERING INC·Filed 2003·Granted Oct 16, 2007·16 cites·14 claims
- 2860US6970774B2Method and system for compensating for wheel wear on a trainQUANTUM ENGINEERING INC·Filed 2003·Granted Nov 29, 2005·17 cites·63 claims
- 2949US2009048725A1Train crew management and security systemQUANTUM ENGINEERING INC·Filed 2007·Application pending·0 cites
- 3048US2007095988A1Method and System for Compensating for Wheel Wear on a TrainQUANTUM ENGINEERING INC·Filed 2006·Application pending·0 cites
- 3147US2010213321A1Method and systems for end of train force reportingQUANTUM ENGINEERING INC·Filed 2009·Application pending·0 cites
- 3244US2008099633A1Method and apparatus for sounding horn on a trainQUANTUM ENGINEERING INC·Filed 2006·Application pending·0 cites
- 3341US2009043435A1Methods and systems for making a gps signal vitalQUANTUM ENGINEERING INC·Filed 2007·Application pending·0 cites
- 3440US2009058624A1Cognitive alerterQUANTUM ENGINEERING INC·Filed 2007·Application pending·0 cites
- 3530US5173681ASpeed sensitive visual warning system for locomotivesQUANTUM ENGINEERING INC·Filed 1990·Granted Dec 22, 1992·6 cites·21 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →