Inventor · disambiguated record
Warren Tan
Also filed as: TAN WARREN · TAN WARREN YUNG-HANG
11 granted patents·2 pending applications·1,002 citations·filing 1994–2024
93Inventor score
Files withCITICORP CREDIT SERVICES INC USA3CHU RONALD KING-HANG2CITICORP DEV CT INC2TRANSACTION TECHNOLOGY INC2CITICORP DEVELOPMEMT CT INC1
Top patents by PatentIndex Score
13 records- 0195US7904946B1Methods and systems for secure user authenticationCITICORP DEV CT INC·Filed 2006·Granted Mar 8, 2011·79 cites·2 claims
- 0294US9002750B1Methods and systems for secure user authenticationCHU RONALD KING-HANG·Filed 2007·Granted Apr 7, 2015·85 cites·30 claims
- 0393US6687714B1Method and system for managing transaction card dataCITICORP DEV CT INC·Filed 2000·Granted Feb 3, 2004·116 cites·41 claims
- 0492US9768963B2Methods and systems for secure user authenticationCHU RONALD KING-HANG·Filed 2011·Granted Sep 19, 2017·26 cites·19 claims
- 0588US5844218AMethod and system for using an application programmable smart card for financial transactions in multiple countriesTRANSACTION TECHNOLOGY INC·Filed 1996·Granted Dec 1, 1998·496 cites·4 claims
- 0686US7484089B1Method and system for certificate delivery and managementCITICORP DEVELOPMEMT CT INC·Filed 2004·Granted Jan 27, 2009·112 cites·41 claims
- 0785USD364386SCustomer identification terminalTRANSACTION TECH INC·Filed 1994·Granted Nov 21, 1995·33 cites·1 claims
- 0878US12101409B1Methods and systems for secure user authenticationCITICORP CREDIT SERVICES INC USA·Filed 2024·Granted Sep 24, 2024·0 cites·20 claims
- 0977US11394553B1Methods and systems for secure user authenticationCITICORP CREDIT SERVICES INC USA·Filed 2017·Granted Jul 19, 2022·2 cites·10 claims
- 1075US11917069B1Methods and systems for secure user authenticationCITICORP CREDIT SERVICES INC USA·Filed 2023·Granted Feb 27, 2024·0 cites·20 claims
- 1165US5768386AMethod and system for encrypting input from a touch screenTRANSACTION TECHNOLOGY INC·Filed 1996·Granted Jun 16, 1998·53 cites·20 claims
- 1242US2007005756A1Shared data center monitorCOMPARATO ROBERT·Filed 2006·Application pending·0 cites
- 1336US2001045451A1Method and system for token-based authenticationFiled 2001·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →