Inventor · disambiguated record
Ryoichi Sasaki
Also filed as: SASAKI RYOICHI
76 granted patents·9 pending applications·3,459 citations·filing 1975–2021
99Inventor score
Files withHITACHI LTD37KURARAY CO22BROTHER IND LTD16KEYENCE CO LTD2MATSUSHITA ELECTRIC INDUSTRIAL CO LTD2
Top patents by PatentIndex Score
85 records- 0199US6889211B1Method and system for distributing multimedia data with management informationHITACHI LTD·Filed 2000·Granted May 3, 2005·540 cites·18 claims
- 0297US6499105B1Digital data authentication methodHITACHI LTD·Filed 2000·Granted Dec 24, 2002·174 cites·60 claims
- 0397US6131162ADigital data authentication methodHITACHI LTD·Filed 1998·Granted Oct 10, 2000·388 cites·63 claims
- 0497US5018196AMethod for electronic transaction with digital signatureHITACHI LTD·Filed 1989·Granted May 21, 1991·259 cites·9 claims
- 0592US4831659AMethod for image data codingHITACHI LTD·Filed 1988·Granted May 16, 1989·86 cites·3 claims
- 0692US4777585AAnalogical inference method and apparatus for a control systemHITACHI LTD·Filed 1986·Granted Oct 11, 1988·131 cites·15 claims
- 0791US5259729APropeller blade tip path plane inclining deviceKEYENCE CO LTD·Filed 1992·Granted Nov 9, 1993·77 cites·12 claims
- 0889US4947447AMethod for data codingHITACHI LTD·Filed 1987·Granted Aug 7, 1990·71 cites·2 claims
- 0988US10354560B2Multilayer label, container including the same, and method for producing containerKURARAY CO·Filed 2015·Granted Jul 16, 2019·2 cites·8 claims
- 1087US5483631ACommunication network management system for displaying operation states of network elements on a remote display unitHITACHI LTD·Filed 1994·Granted Jan 9, 1996·181 cites·10 claims
- 1186US9260622B2Composite structural material formed product and packaging material using the same, method for producing the composite structural material, and coating liquidYOSHIDA KENTARO·Filed 2011·Granted Feb 16, 2016·4 cites·22 claims
- 1285US4876681APacket switching equipment and a packet switching method for controlling packet switched networksHITACHI LTD·Filed 1988·Granted Oct 24, 1989·89 cites·6 claims
- 1384US5750974ALighting apparatus having light emitting diodes arranged in a plurality of planes on a printed circuit boardKEYENCE CO LTD·Filed 1996·Granted May 12, 1998·108 cites·22 claims
- 1483US7305558B1Digital signing methodHITACHI LTD·Filed 2000·Granted Dec 4, 2007·38 cites·14 claims
- 1583US4979995AMember made of nickel base alloy having high resistance to stress corrosion cracking and method of producing sameHITACHI LTD·Filed 1989·Granted Dec 25, 1990·30 cites·20 claims
- 1682US7526645B2Electronic document authenticity assurance method and electronic document disclosure systemHITACHI LTD·Filed 2004·Granted Apr 28, 2009·31 cites·9 claims
- 1782US6816969B2Digital signature generating method and digital signature verifying methodHITACHI LTD·Filed 2001·Granted Nov 9, 2004·41 cites·13 claims
- 1882US6775775B1Method of physical individual authentication and system using the sameHITACHI LTD·Filed 2000·Granted Aug 10, 2004·66 cites·4 claims
- 1982US5117458ASecret information service system and methodHITACHI LTD·Filed 1990·Granted May 26, 1992·111 cites·19 claims
- 2082US4920529ANetwork control method and apparatus thereforHITACHI LTD·Filed 1988·Granted Apr 24, 1990·67 cites·7 claims
- 2180US10240062B2Antistatic sheet, and packaging material and electronic device including the sameKURARAY CO·Filed 2015·Granted Mar 26, 2019·1 cites·8 claims
- 2279US11692106B2Multilayer structure and method for producing same, coating liquid, packaging material, and protective sheet for electronic devicesKURARAY CO·Filed 2021·Granted Jul 4, 2023·0 cites·13 claims
- 2379US7694126B2Method and system for recovering the validity of cryptographically signed digital dataHITACHI LTD·Filed 2005·Granted Apr 6, 2010·7 cites·11 claims
- 2479US5031211ACommunication circuit switching or parallel operation systemHITACHI LTD·Filed 1990·Granted Jul 9, 1991·82 cites·50 claims
- 2578US7047412B2Digital watermark data embedding method, and digital watermark data embeddability analyzing methodHITACHI LTD·Filed 2001·Granted May 16, 2006·19 cites·12 claims
- 2676US7770009B2Digital signing methodHITACHI LTD·Filed 2007·Granted Aug 3, 2010·6 cites·9 claims
- 2776US5767845AMulti-media information record device, and a multi-media information playback deviceMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1995·Granted Jun 16, 1998·49 cites·26 claims
- 2875US7200682B2Time stamp generating systemHITACHI LTD·Filed 2002·Granted Apr 3, 2007·21 cites·8 claims
- 2975US6865677B1Contents rendering control method, contents reproducing equipment, and contents distribution equipmentHITACHI LTD·Filed 2000·Granted Mar 8, 2005·15 cites·23 claims
- 3074US10273379B2Multilayer structure and method for producing sameKURARAY CO·Filed 2014·Granted Apr 30, 2019·1 cites·19 claims
- 3174US10265935B2Product comprising packaging material comprising multilayer structureKURARAY CO·Filed 2014·Granted Apr 23, 2019·1 cites·13 claims
- 3274US7134021B2Method and system for recovering the validity of cryptographically signed digital dataHITACHI LTD·Filed 2001·Granted Nov 7, 2006·16 cites·40 claims
- 3372US5204955ANetwork management method and systemHITACHI LTD·Filed 1990·Granted Apr 20, 1993·78 cites·11 claims
- 3470US4477280AHeat resisting steelHITACHI LTD·Filed 1982·Granted Oct 16, 1984·17 cites·16 claims
- 3568US11214696B2Multilayer structure and method for producing same, coating liquid, packaging material, and protective sheet for electronic devicesKURARAY CO·Filed 2017·Granted Jan 4, 2022·0 cites·17 claims
- 3668US4901313AA-point to multi-points communication systemHITACHI LTD·Filed 1988·Granted Feb 13, 1990·32 cites·32 claims
- 3768US4885788AIC cardHITACHI LTD·Filed 1987·Granted Dec 5, 1989·139 cites·4 claims
- 3868US4885777AElectronic transaction systemHITACHI LTD·Filed 1988·Granted Dec 5, 1989·154 cites·4 claims
- 3966USRE39652EMulti-media information record device, and a multi-media information playback deviceMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2000·Granted May 22, 2007·5 cites·26 claims
- 4066US5103479AEncipher method and decipher methodHITACHI LTD·Filed 1990·Granted Apr 7, 1992·45 cites·10 claims
- 4164US4413373APivot hinge with removable door closing deviceNIPPON ELECTRIC IND·Filed 1981·Granted Nov 8, 1983·24 cites·9 claims
- 4261US12353184B2Programmable controller, programmable controller system, and recording mediumMITSUBISHI ELECTRIC CORP·Filed 2021·Granted Jul 8, 2025·0 cites·20 claims
- 4361US12097688B2Multilayer structure, method for producing same, packaging material and product including same, and protective sheet for electronic deviceKURARAY CO·Filed 2020·Granted Sep 24, 2024·0 cites·20 claims
- 4461US10414144B2Multilayer structure, method for producing same, packaging material and product including same, and protective sheet for electronic deviceKURARAY CO·Filed 2015·Granted Sep 17, 2019·0 cites·16 claims
- 4561US4982429AEncipher method and decipher methodHITACHI LTD·Filed 1989·Granted Jan 1, 1991·22 cites·41 claims
- 4660US10814350B2Method for producing composite structural materialKURARAY CO·Filed 2015·Granted Oct 27, 2020·0 cites·16 claims
- 4760US10479055B2Multilayer structure, packaging material and product including same, and protective sheet for electronic deviceKURARAY CO·Filed 2015·Granted Nov 19, 2019·0 cites·16 claims
- 4859US10584282B2Electronic device and method for producing sameKURARAY CO·Filed 2015·Granted Mar 10, 2020·0 cites·15 claims
- 4958US4969190AEncrypting system of dataHITACHI LTD·Filed 1989·Granted Nov 6, 1990·21 cites·13 claims
- 5057US10647487B2Multilayer structure, method for producing same, packaging material and product including same, and protective sheet for electronic deviceKURARAY CO·Filed 2016·Granted May 12, 2020·0 cites·20 claims
Showing the top 50 of 85 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →