Inventor · disambiguated record
Ryota Akiyama
Also filed as: AKIYAMA RYOTA
44 granted patents·12 pending applications·3,359 citations·filing 1988–2020
99Inventor score
Files withFUJITSU LTD46FUJITSU BROAD SOLUTION & CONSULTING INC2YAMAGUCHI HIROAKI23M INNOVATIVE PROPERTIES CO1AKIYAMA RYOTA1
Top patents by PatentIndex Score
56 records- 0198US5392351AElectronic data protection systemFUJITSU LTD·Filed 1993·Granted Feb 21, 1995·373 cites·10 claims
- 0294US5784464ASystem for and method of authenticating a clientFUJITSU LTD·Filed 1996·Granted Jul 21, 1998·305 cites·8 claims
- 0393US6700989B1Device for generating, detecting, recording, and reproducing a watermarked moving image having a copy preventing capability and storage medium for storing program or the moving imageFUJITSU LTD·Filed 1998·Granted Mar 2, 2004·192 cites·27 claims
- 0493US5796824AStorage medium for preventing an irregular use by a third partyFUJITSU LTD·Filed 1996·Granted Aug 18, 1998·163 cites·16 claims
- 0592US5805699ASoftware copying systemFUJITSU LTD·Filed 1996·Granted Sep 8, 1998·202 cites·7 claims
- 0692US5737413AInformation distribution system wherein storage medium storing ciphered information is distributedFUJITSU LTD·Filed 1995·Granted Apr 7, 1998·180 cites·28 claims
- 0790US5555304AStorage medium for preventing an illegal use by a third partyFUJITSU LTD·Filed 1994·Granted Sep 10, 1996·109 cites·28 claims
- 0885US5539825AElectronic cashless transaction systemFUJITSU LTD·Filed 1994·Granted Jul 23, 1996·327 cites·6 claims
- 0983US7000114B1Apparatus to create and/or verify digital signatures having a secure time element and an identifier of the apparatusFUJITSU LTD·Filed 2000·Granted Feb 14, 2006·40 cites·7 claims
- 1082US6944734B2Storage apparatus and access control methodFUJITSU LTD·Filed 2000·Granted Sep 13, 2005·18 cites·18 claims
- 1182US5499299AModular arithmetic operation systemFUJITSU LTD·Filed 1994·Granted Mar 12, 1996·101 cites·11 claims
- 1282US5428684AElectronic cashless transaction systemFUJITSU LTD·Filed 1992·Granted Jun 27, 1995·275 cites·14 claims
- 1381US5386468AMethod of registering identification number in personal communication terminalFUJITSU LTD·Filed 1993·Granted Jan 31, 1995·138 cites·24 claims
- 1479US8021964B2Method of producing segmented chips3M INNOVATIVE PROPERTIES CO·Filed 2007·Granted Sep 20, 2011·7 cites·5 claims
- 1579US7257393B2Method and apparatus for time calibrationCITIZEN HOLDINGS CO LTD·Filed 2005·Granted Aug 14, 2007·10 cites·15 claims
- 1679US5787179AScrambling and descrambling of data with improved securityFUJITSU LTD·Filed 1996·Granted Jul 28, 1998·68 cites·27 claims
- 1779US5623548ATransformation pattern generating device and encryption function deviceFUJITSU LTD·Filed 1995·Granted Apr 22, 1997·119 cites·16 claims
- 1878US6144745AMethod of and apparatus for retaining and verifying of data on recording mediumFUJITSU LTD·Filed 1998·Granted Nov 7, 2000·33 cites·17 claims
- 1976US7013392B1File processing unitFUJITSU LTD·Filed 2000·Granted Mar 14, 2006·24 cites·17 claims
- 2075US5584022AEnciphered file sharing methodFUJITSU LTD·Filed 1993·Granted Dec 10, 1996·66 cites·12 claims
- 2173US5812661ASoftware reproduction apparatusFUJITSU LTD·Filed 1995·Granted Sep 22, 1998·59 cites·7 claims
- 2273US5440631AInformation distribution system wherein storage medium storing ciphered information is distributedFUJITSU LTD·Filed 1993·Granted Aug 8, 1995·55 cites·41 claims
- 2372US5325433AEncryption communication systemFUJITSU LTD·Filed 1993·Granted Jun 28, 1994·64 cites·16 claims
- 2471US4959863ASecret speech equipmentFUJITSU LTD·Filed 1988·Granted Sep 25, 1990·27 cites·15 claims
- 2569US7154824B2Storage apparatusFUJITSU LTD·Filed 2004·Granted Dec 26, 2006·7 cites·12 claims
- 2668US5832210ADevice and method for controlling communicationFUJITSU LTD·Filed 1995·Granted Nov 3, 1998·72 cites·22 claims
- 2767US6460137B1Encryption processing systemFUJITSU LTD·Filed 1996·Granted Oct 1, 2002·69 cites·11 claims
- 2862US7961871B2Encryption process, encryption device, and computer-readable medium storing encryption programFUJITSU BROAD SOLUTION & CONSULTING INC·Filed 2007·Granted Jun 14, 2011·6 cites·7 claims
- 2962US7421078B2Valid medium management systemFUJITSU LTD·Filed 2002·Granted Sep 2, 2008·4 cites·12 claims
- 3061US5822771ASystem for management of software employing memory for processing unit with regulatory information, for limiting amount of use and number of backup copies of softwareFUJITSU LTD·Filed 1997·Granted Oct 13, 1998·33 cites·12 claims
- 3160US12391955B2Plant having enhanced resistance against colorado potato beetle and method for producing same, and method for evaluating resistance against colorado potato beetle in plantKANEKA CORP·Filed 2020·Granted Aug 19, 2025·0 cites·6 claims
- 3260US5680453ASoftware delivery system, center device, relaying device and user terminal deviceFUJITSU LTD·Filed 1995·Granted Oct 21, 1997·38 cites·7 claims
- 3358US5737415AData management module, data reproduction management device and data reproduction management systemFUJITSU LTD·Filed 1995·Granted Apr 7, 1998·34 cites·16 claims
- 3453US6636970B2Software encoding using a combination of two types of encoding and encoding type identification informationFUJITSU LTD·Filed 1996·Granted Oct 21, 2003·27 cites·20 claims
- 3553US5812663AData reproducing deviceFUJITSU LTD·Filed 1995·Granted Sep 22, 1998·27 cites·9 claims
- 3652US7010127B2Cryptographic communication method, file access system and recording mediumFUJITSU LTD·Filed 2000·Granted Mar 7, 2006·2 cites·12 claims
- 3750US6067640ASystem for management of software employing memory for processing unit with regulatory information, for limiting amount of use and number of backup copies of softwareFUJITSU LTD·Filed 1998·Granted May 23, 2000·19 cites·17 claims
- 3848US5768387AKey authentication method and key authentication apparatusFUJITSU LTD·Filed 1995·Granted Jun 16, 1998·35 cites·13 claims
- 3948US2011151176A1Method of manufacturing wafer laminated body, device of manufacturing wafer laminated body, wafer laminated body, method of peeling support body, and method of manufacturing waferAKIYAMA RYOTA·Filed 2009·Application pending·0 cites
- 4048US2005256230A1Cationic polymerizable adhesive composition and anisotropically electroconductive adhesive compositionYAMAGUCHI HIROAKI·Filed 2003·Application pending·0 cites
- 4146US2008022116A1Time stamp apparatus, time correcting method, and time correcting programFUJITSU LTD·Filed 2007·Application pending·0 cites
- 4246US2007300065A1Time stamp apparatus, time correcting method, and time correcting programFUJITSU LTD·Filed 2007·Application pending·0 cites
- 4345US7555651B2Time management apparatus and time management methodFUJITSU LTD·Filed 2005·Granted Jun 30, 2009·0 cites·20 claims
- 4443USRE40547ESoftware reproduction apparatusFUJITSU LTD·Filed 2000·Granted Oct 21, 2008·0 cites·41 claims
- 4542US2005058028A1Optical information recording mediumFUJITSU LTD·Filed 2004·Application pending·0 cites
- 4642US2005018848A1Security system using optical information recording mediumFUJITSU LTD·Filed 2004·Application pending·0 cites
- 4741US2003159045A1Original creating apparatus and originality guaranteeing apparatusFUJITSU LTD·Filed 2002·Application pending·0 cites
- 4840US5774651AFalse statement detection systemFUJITSU LTD·Filed 1996·Granted Jun 30, 1998·12 cites·13 claims
- 4940US5065430AVoice band splitting scramblerFUJITSU LTD·Filed 1988·Granted Nov 12, 1991·6 cites·26 claims
- 5040US2005055313A1Method for distributing softwareFiled 2001·Application pending·0 cites
Showing the top 50 of 56 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →