Inventor · disambiguated record
David Chaum
Also filed as: CHAUM DAVID · CHAUM DAVID L
33 granted patents·18 pending applications·5,079 citations·filing 1982–2023
98Inventor score
Top patents by PatentIndex Score
51 records- 0199US4926480ACard-computer moderated systemsCHAUM DAVID·Filed 1988·Granted May 15, 1990·507 cites·18 claims
- 0298US10375042B2Precomputed and transactional mixingCHAUM DAVID·Filed 2016·Granted Aug 6, 2019·39 cites·16 claims
- 0398US4759064ABlind unanticipated signature systemsCHAUM DAVID L·Filed 1985·Granted Jul 19, 1988·396 cites·44 claims
- 0497US4529870ACryptographic identification, financial transaction, and credential deviceCHAUM DAVID·Filed 1982·Granted Jul 16, 1985·679 cites·21 claims
- 0596US5485520AAutomatic real-time highway toll collection from moving vehiclesAMTECH CORP·Filed 1993·Granted Jan 16, 1996·501 cites·46 claims
- 0695US4759063ABlind signature systemsCHAUM DAVID L·Filed 1983·Granted Jul 19, 1988·317 cites·41 claims
- 0793US4991210AUnpredictable blind signature systemsCHAUM DAVID·Filed 1989·Granted Feb 5, 1991·139 cites·4 claims
- 0893US4949380AReturned-value blind signature systemsCHAUM DAVID·Filed 1988·Granted Aug 14, 1990·148 cites·14 claims
- 0992US6718314B2Multi-purpose transaction card systemINFOSPACE INC·Filed 2002·Granted Apr 6, 2004·80 cites·2 claims
- 1090US5276736AOptionally moderated transaction systemsCHAUM DAVID·Filed 1992·Granted Jan 4, 1994·159 cites·8 claims
- 1189US7516891B2Ballot integrity systemsCHAUM DAVID·Filed 2006·Granted Apr 14, 2009·40 cites·23 claims
- 1287US5956400APartitioned information storage systems with controlled retrievalDIGICASH INC·Filed 1996·Granted Sep 21, 1999·243 cites·54 claims
- 1384US5373558ADesinated-confirmer signature systemsFiled 1993·Granted Dec 13, 1994·116 cites·24 claims
- 1483US5131039AOptionally moderated transaction systemsCHAUM DAVID·Filed 1990·Granted Jul 14, 1992·132 cites·9 claims
- 1580US6434238B1Multi-purpose transaction card systemINFOSPACE INC·Filed 1997·Granted Aug 13, 2002·224 cites·10 claims
- 1678US10050786B2Random sample electionsCHAUM DAVID·Filed 2017·Granted Aug 14, 2018·3 cites·5 claims
- 1778US8123114B2Hidden-code voting and marking systemsCHAUM DAVID·Filed 2009·Granted Feb 28, 2012·1 cites·2 claims
- 1877US5493614APrivate signature and proof systemsFiled 1994·Granted Feb 20, 1996·81 cites·22 claims
- 1976US7210617B2Secret-ballot systems with voter-verifiable integrityCHAUM DAVID·Filed 2003·Granted May 1, 2007·37 cites·10 claims
- 2076US4996711ASelected-exponent signature systemsCHAUM DAVID L·Filed 1989·Granted Feb 26, 1991·188 cites·15 claims
- 2176US2024056431A1Precomputed and transactional mixingDIGITAL COMMUNITY LLC·Filed 2023·Application pending·0 cites
- 2275US4914698AOne-show blind signature systemsCHAUM DAVID·Filed 1989·Granted Apr 3, 1990·180 cites·1 claims
- 2374US6318137B1Electronic lock that can learn to recognize any ordinary keyCHAUM DAVID·Filed 1999·Granted Nov 20, 2001·124 cites·15 claims
- 2472US4947430AUndeniable signature systemsCHAUM DAVID·Filed 1987·Granted Aug 7, 1990·159 cites·48 claims
- 2571US2022078172A1Precomputed and transactional mixingDIGITAL COMMUNITY LLC·Filed 2021·Application pending·0 cites
- 2669US5712913ALimited-traceability systemsDIGICASH INC·Filed 1994·Granted Jan 27, 1998·137 cites·51 claims
- 2769US5434919ACompact endorsement signature systemsFiled 1994·Granted Jul 18, 1995·139 cites·6 claims
- 2869US2022366751A1Random sample electionsDIGITAL COMMUNITY LLC·Filed 2022·Application pending·0 cites
- 2967US11403903B2Random sample electionsCHAUM DAVID·Filed 2018·Granted Aug 2, 2022·0 cites·12 claims
- 3067US8162215B2Scan-integrity election systemsCHAUM DAVID·Filed 2008·Granted Apr 24, 2012·3 cites·5 claims
- 3165US11184338B2Precomputed and transactional mixingCHAUM DAVID·Filed 2019·Granted Nov 23, 2021·0 cites·16 claims
- 3263US5878140ALimited-traceability systemsDIGICASH INC·Filed 1997·Granted Mar 2, 1999·37 cites·10 claims
- 3363US2023006836A1Multi-party and multi-use quantum resistant signatures and key establishmentCHAUM DAVID·Filed 2020·Application pending·0 cites
- 3462US4987593AOne-show blind signature systemsCHAUM DAVID·Filed 1990·Granted Jan 22, 1991·131 cites·13 claims
- 3561US2012132713A1Hidden-code voting and marking systemsCHAUM DAVID·Filed 2012·Application pending·0 cites
- 3659US6035380AIntegrated circuitFiled 1996·Granted Mar 7, 2000·102 cites·10 claims
- 3759US2025013995A1Digital currencyCHAUM DAVID·Filed 2022·Application pending·0 cites
- 3857US2022163806A1Eyeglass device with touch sensor and method of useDIGITAL COMMUNITY LLC·Filed 2022·Application pending·0 cites
- 3954US2022027912A1Cryptographic physical random objectCHAUM DAVID·Filed 2021·Application pending·0 cites
- 4054US2014172517A1Random sample electionsCHAUM DAVID·Filed 2012·Application pending·0 cites
- 4154US2022076253A1Computation mixingCHAUM DAVID·Filed 2021·Application pending·0 cites
- 4253US10536670B2Video copy prevention systems with interaction and compressionCHAUM DAVID·Filed 2008·Granted Jan 14, 2020·0 cites·8 claims
- 4351US2010149073A1Near to Eye Display System and ApplianceCHAUM DAVID·Filed 2009·Application pending·0 cites
- 4450US2015277123A1Near to eye display and applianceCHAUM DAVID·Filed 2015·Application pending·0 cites
- 4549US2003104859A1Random number generator security systemsFiled 2002·Application pending·0 cites
- 4648US2006191419A1Wine vessel systemSPOLJARIC EDWARD S·Filed 2006·Application pending·0 cites
- 4748US2003205070A1Electronic lock that can learn to recognize any ordinary keyFiled 2001·Application pending·0 cites
- 4847US5781631ALimited-traceability systemsDIGICASH INC·Filed 1997·Granted Jul 14, 1998·37 cites·3 claims
- 4947US2010110368A1System and apparatus for eyeglass appliance platformCHAUM DAVID·Filed 2009·Application pending·0 cites
- 5045US2001034640A1Physical and digital secret ballot systemsFiled 2001·Application pending·0 cites
Showing the top 50 of 51 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →