Inventor · disambiguated record
Ahto Buldas
Also filed as: BULDAS AHTO
18 granted patents·6 pending applications·120 citations·filing 2002–2022
92Inventor score
Top patents by PatentIndex Score
24 records- 0195US8719576B2Document verification with distributed calendar infrastructureGUARDTIME IP HOLDINGS LTD·Filed 2012·Granted May 6, 2014·38 cites·11 claims
- 0292US10103893B2Blockchain-supported, fail-safe synchronization in a data authentication infrastructureGUARDTIME IP HOLDINGS LTD·Filed 2018·Granted Oct 16, 2018·13 cites·17 claims
- 0392US9614682B2System and method for sequential data signaturesGUARDTIME IP HOLDINGS LTD·Filed 2015·Granted Apr 4, 2017·20 cites·39 claims
- 0480US11057187B2Blockchain-assisted hash-based data signature system and methodGUARDTIME SA·Filed 2019·Granted Jul 6, 2021·4 cites·7 claims
- 0579US8312528B2System and method for generating a digital certificateSAAREPERA MART·Filed 2010·Granted Nov 13, 2012·7 cites·7 claims
- 0677US8347372B2System and method for generating a digital certificateGUARDTIME IP HOLDINGS LTD·Filed 2010·Granted Jan 1, 2013·4 cites·12 claims
- 0775US9122846B2Document verification with distributed calendar infrastructureGUARDTIME IP HOLDINGS LTD·Filed 2014·Granted Sep 1, 2015·3 cites·6 claims
- 0873US9473306B2Document verification with ID augmentationGUARDTIME IP HOLDINGS LTD·Filed 2013·Granted Oct 18, 2016·4 cites·13 claims
- 0972US9268969B2System and method for field-verifiable record authenticationGUARDTIME IP HOLDINGS LTD·Filed 2013·Granted Feb 23, 2016·5 cites·25 claims
- 1071US9178708B2Non-deterministic time systems and methodsGUARDTIME IP HOLDINGS LTD·Filed 2013·Granted Nov 3, 2015·3 cites·22 claims
- 1171US7698557B2System and method for generating a digital certificateGUARDTIME AS·Filed 2004·Granted Apr 13, 2010·18 cites·15 claims
- 1256US2004193872A1System and method for renewing and extending digitally signed certificatesFiled 2002·Application pending·0 cites
- 1354US2023342774A1Atomic Multi-Unit Transfer of Single-Instance Data Units in Sharded BlockchainGUARDTIME SA·Filed 2022·Application pending·0 cites
- 1451US8874921B2System and method for generating keyless digital multi-signaturesBULDAS AHTO·Filed 2011·Granted Oct 28, 2014·1 cites·6 claims
- 1550US9876779B2Document verification with distributed calendar infrastructureGUARDTIME IP HOLDINGS LTD·Filed 2015·Granted Jan 23, 2018·0 cites·1 claims
- 1645US2022284129A1Verifiable Splitting of Single-Instance Data Using Sharded BlockchainGUARDTIME SA·Filed 2021·Application pending·0 cites
- 1744US12112324B2Verifiably unique transfer of exclusive control of data unitsGUARDTIME SA·Filed 2021·Granted Oct 8, 2024·0 cites·16 claims
- 1844US12093952B2Verifiable transfer of data using sharded blockchainGUARDTIME SA·Filed 2021·Granted Sep 17, 2024·0 cites·8 claims
- 1941US2014245020A1Verification System and Method with Extra Security for Lower-Entropy Input RecordsGUARDTIME IP HOLDINGS LTD·Filed 2013·Application pending·0 cites
- 2039US2018152442A1Blockchain-supported, hash tree-based digital signature infrastructureGUARDTIME IP HOLDINGS LTD·Filed 2018·Application pending·0 cites
- 2136US9911007B2Redundant fail-safe synchronization in a data authentication infrastructureGUARDTIME IP HOLDINGS LTD·Filed 2015·Granted Mar 6, 2018·0 cites·23 claims
- 2235US12206792B2Digital signature system using scalable serversPLANETWAY CORP·Filed 2020·Granted Jan 21, 2025·0 cites·15 claims
- 2329US2023048174A1Digital signature system using reliable serversPLANETWAY CORP·Filed 2020·Application pending·0 cites
- 2427US11251970B2Composite digital signaturesCYBERNETICA AS·Filed 2017·Granted Feb 15, 2022·0 cites·17 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →