Inventor · disambiguated record
David Yu Chang
Also filed as: CHANG DAVID · CHANG DAVID Y · CHANG DAVID YU · CHANG DAVID YU-ZHANG
72 granted patents·20 pending applications·2,314 citations·filing 1993–2024
99Inventor score
Top patents by PatentIndex Score
92 records- 0198US8769622B2Authentication and authorization methods for cloud computing securityCHANG DAVID YU·Filed 2011·Granted Jul 1, 2014·783 cites·14 claims
- 0297US11066977B1Ignitor for natural gas engineCATERPILLAR INC·Filed 2020·Granted Jul 20, 2021·5 cites·14 claims
- 0396US11637691B2Management of a size of a ledgerIBM·Filed 2018·Granted Apr 25, 2023·17 cites·14 claims
- 0496US11078826B1Gaseous fuel engine and sparkless operating strategy thereforCATERPILLAR INC·Filed 2020·Granted Aug 3, 2021·11 cites·20 claims
- 0595US7874008B2Dynamically configuring extensible role based manageable resourcesIBM·Filed 2006·Granted Jan 18, 2011·51 cites·14 claims
- 0694US6950825B2Fine grained role-based access to system resourcesIBM·Filed 2002·Granted Sep 27, 2005·132 cites·27 claims
- 0791US9288214B2Authentication and authorization methods for cloud computing platform securityIBM·Filed 2014·Granted Mar 15, 2016·13 cites·18 claims
- 0889US7849836B2Cooling feature for fuel injector and fuel system using sameCATERPILLAR INC·Filed 2008·Granted Dec 14, 2010·14 cites·17 claims
- 0989US5535403AMethod and apparatus for displaying clusters on a computer networkIBM·Filed 1993·Granted Jul 9, 1996·87 cites·2 claims
- 1088US11297066B2Constrained roles for access managementIBM·Filed 2020·Granted Apr 5, 2022·3 cites·18 claims
- 1188US11078827B2Pre-chamber ignition system having igniter with gas orifice structured for pre-expanding outgoing combustion gasesCATERPILLAR INC·Filed 2018·Granted Aug 3, 2021·3 cites·18 claims
- 1288US7731089B2Interactive physical mail content managementIBM·Filed 2006·Granted Jun 8, 2010·18 cites·16 claims
- 1386US6988471B2Engine valve actuation systemCATERPILLAR INC·Filed 2003·Granted Jan 24, 2006·21 cites·59 claims
- 1485US11196774B2Network application security question detection and modificationIBM·Filed 2020·Granted Dec 7, 2021·2 cites·20 claims
- 1584US8290163B2Automatic wireless network password updateCHANG DAVID YU·Filed 2008·Granted Oct 16, 2012·11 cites·17 claims
- 1684US7299288B2System and method for concurrent security connectionsIBM·Filed 2005·Granted Nov 20, 2007·14 cites·15 claims
- 1784US5542040ADisplay of dynamic data as a notebookIBM·Filed 1993·Granted Jul 30, 1996·100 cites·29 claims
- 1883US10592608B2Topic based conversation retrievalIBM·Filed 2018·Granted Mar 17, 2020·3 cites·17 claims
- 1983US10072561B2PistonCATERPILLAR INC·Filed 2016·Granted Sep 11, 2018·2 cites·17 claims
- 2083US5706516ASystem for communicating messages among agent processesIBM·Filed 1995·Granted Jan 6, 1998·119 cites·5 claims
- 2181US11138188B2Performance optimizationIBM·Filed 2018·Granted Oct 5, 2021·3 cites·17 claims
- 2281US7139918B2Multiple secure socket layer keyfiles for client login supportIBM·Filed 2002·Granted Nov 21, 2006·32 cites·12 claims
- 2380US7946276B2Protection device for a solenoid operated valve assemblyCATERPILLAR INC·Filed 2008·Granted May 24, 2011·10 cites·19 claims
- 2480US7228826B2Internal combustion engine valve seating velocity controlCATERPILLAR INC·Filed 2004·Granted Jun 12, 2007·17 cites·17 claims
- 2579US5675798ASystem and method for selectively and contemporaneously monitoring processes in a multiprocessing serverIBM·Filed 1996·Granted Oct 7, 1997·80 cites·6 claims
- 2676US12359605B1Systems and methods for in-cylinder engine pressure sensor coolingCATERPILLAR INC·Filed 2024·Granted Jul 15, 2025·0 cites·20 claims
- 2776US11032083B2Atomic transactional processingIBM·Filed 2018·Granted Jun 8, 2021·2 cites·17 claims
- 2876US7210125B2Method and system for application installation and management using an application-based naming system including aliasesIBM·Filed 2003·Granted Apr 24, 2007·21 cites·21 claims
- 2976US7178491B2Control system and method for engine valve actuatorCATERPILLAR INC·Filed 2003·Granted Feb 20, 2007·15 cites·27 claims
- 3075US6687831B1Method and apparatus for multiple security service enablement in a data processing systemIBM·Filed 1999·Granted Feb 3, 2004·73 cites·19 claims
- 3175US5636376ASystem and method for selectively and contemporaneously monitoring processes in a multiprocessing serverIBM·Filed 1995·Granted Jun 3, 1997·70 cites·5 claims
- 3273US7546640B2Fine-grained authorization by authorization table associated with a resourceIBM·Filed 2003·Granted Jun 9, 2009·17 cites·30 claims
- 3373US7203697B2Fine-grained authorization using mbeansIBM·Filed 2003·Granted Apr 10, 2007·17 cites·20 claims
- 3473US6292825B1Service application with pull notificationIBM·Filed 1998·Granted Sep 18, 2001·93 cites·11 claims
- 3571US11326507B2Ignitor for natural gas engineCATERPILLAR INC·Filed 2021·Granted May 10, 2022·0 cites·20 claims
- 3671US7076798B2Securing non-EJB corba objects using an EJB security mechanismIBM·Filed 2002·Granted Jul 11, 2006·18 cites·12 claims
- 3771US5802383AMethod and apparatus for displaying clusters on a computer networkIBM·Filed 1996·Granted Sep 1, 1998·42 cites·21 claims
- 3869US6708656B1Engine valve actuatorCATERPILLAR INC·Filed 2002·Granted Mar 23, 2004·11 cites·20 claims
- 3969US6360717B1Fuel injection system and a method for operatingCATERPILLAR INC·Filed 2000·Granted Mar 26, 2002·12 cites·15 claims
- 4068US5870753AMethod and apparatus for enabling a persistent metastate for objects in an object oriented environmentIBM·Filed 1996·Granted Feb 9, 1999·61 cites·18 claims
- 4167US6997148B1Engine valve actuatorCATERPILLAR INC·Filed 2004·Granted Feb 14, 2006·9 cites·22 claims
- 4267US6769385B1System for controlling engine valve seating velocityCATERPILLAR INC·Filed 2003·Granted Aug 3, 2004·10 cites·22 claims
- 4367US5504886ASystem and method for applying user supplied relation definitions to application files for a relational databaseIBM·Filed 1993·Granted Apr 2, 1996·46 cites·6 claims
- 4466US10897463B2Managing and securing manageable resources in stateless web server architecture using servlet filtersIBM·Filed 2019·Granted Jan 19, 2021·0 cites·12 claims
- 4566US10650134B2Discreet user identification and multiple device modes of operationsIBM·Filed 2018·Granted May 12, 2020·1 cites·20 claims
- 4666US10382563B2Establishing cross-vendor secure connectivity in a shared computing environmentIBM·Filed 2017·Granted Aug 13, 2019·1 cites·20 claims
- 4766US5870742AMethod and apparatus for enabling persistent attributes in an object oriented environmentIBM·Filed 1996·Granted Feb 9, 1999·58 cites·13 claims
- 4864US6286025B1Method and system of process identification by user defined process variablesIBM·Filed 1994·Granted Sep 4, 2001·39 cites·26 claims
- 4963US7454786B2Method for integrated security rolesIBM·Filed 2003·Granted Nov 18, 2008·8 cites·1 claims
- 5063US6957634B2Engine valve actuatorCATERPILLAR INC·Filed 2002·Granted Oct 25, 2005·7 cites·22 claims
Showing the top 50 of 92 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →