Inventor · disambiguated record
Ryuji Ishiguro
Also filed as: ISHIGURO RYUJI
80 granted patents·12 pending applications·1,971 citations·filing 1996–2025
99Inventor score
Top patents by PatentIndex Score
92 records- 0196US7073061B2Data transmission systemSONY CORP·Filed 2005·Granted Jul 4, 2006·17 cites·1 claims
- 0295US7266202B1Information processing device and method, and program storage mediumSONY CORP·Filed 2000·Granted Sep 4, 2007·43 cites·10 claims
- 0395US7225339B2Information recording/playback apparatus and methodSONY CORP·Filed 2001·Granted May 29, 2007·70 cites·44 claims
- 0495US5917910AEncrypting method and apparatus, recording method, decrypting method and apparatus, and recording mediumSONY CORP·Filed 1996·Granted Jun 29, 1999·91 cites·19 claims
- 0594US7336791B2Information processing apparatusSONY CORP·Filed 2002·Granted Feb 26, 2008·46 cites·8 claims
- 0694US6944763B1Data transmission systemSONY CORP·Filed 2000·Granted Sep 13, 2005·24 cites·44 claims
- 0793US6975726B2Data transmission systemSONY CORP·Filed 2005·Granted Dec 13, 2005·8 cites·1 claims
- 0893US6792539B1Processing method and apparatus for encrypted data transferSONY CORP·Filed 2000·Granted Sep 14, 2004·39 cites·16 claims
- 0992US7143445B1Information processing apparatus, information processing method, and program storage mediumSONY CORP·Filed 2000·Granted Nov 28, 2006·62 cites·9 claims
- 1092US6934463B2Information processing apparatus, information processing method, information processing system and recording mediumSONY CORP·Filed 2002·Granted Aug 23, 2005·26 cites·35 claims
- 1192US6807641B1Content provider systemSONY CORP·Filed 2000·Granted Oct 19, 2004·65 cites·12 claims
- 1291US7587597B2Data transmission systemSONY CORP·Filed 2005·Granted Sep 8, 2009·6 cites·1 claims
- 1391US7522726B2Transmitter device, transmitting method, receiver device, receiving method, communication system, and program storage mediumSONY CORP·Filed 2005·Granted Apr 21, 2009·24 cites·13 claims
- 1491US7337320B2Streaming system for distributing encrypted data, and streaming method thereforSONY CORP·Filed 2003·Granted Feb 26, 2008·77 cites·34 claims
- 1591US7296153B2Data transmission systemSONY CORP·Filed 2005·Granted Nov 13, 2007·6 cites·1 claims
- 1690US8170206B2Enciphering apparatus and method, deciphering apparatus and method as well as information processing apparatus and methodISHIGURO RYUJI·Filed 2010·Granted May 1, 2012·9 cites·102 claims
- 1790US7487549B2Information processing apparatus, information processing method, recording medium, and programSONY CORP·Filed 2003·Granted Feb 3, 2009·27 cites·9 claims
- 1890US7263613B2Data transmission systemSONY CORP·Filed 2005·Granted Aug 28, 2007·5 cites·1 claims
- 1990US7237112B1Information processing systemSONY CORP·Filed 2000·Granted Jun 26, 2007·67 cites·3 claims
- 2090US7085930B2Data transmission systemSONY CORP·Filed 2005·Granted Aug 1, 2006·5 cites·1 claims
- 2189US8042192B2Information processing apparatus, information processing method, recording medium, and programSONY CORP·Filed 2008·Granted Oct 18, 2011·8 cites·9 claims
- 2289US7260721B2Information processing method, information processing apparatus and recording mediumSONY CORP·Filed 2002·Granted Aug 21, 2007·56 cites·13 claims
- 2389US7242769B2Enciphering apparatus and method, deciphering apparatus and method as well as information processing apparatus and methodSONY CORP·Filed 2006·Granted Jul 10, 2007·10 cites·18 claims
- 2489US6360320B2Information processing apparatus, information processing method, information processing system and recording medium using an apparatus id and provided license key for authentication of each information to be processedSONY CORP·Filed 1998·Granted Mar 19, 2002·154 cites·70 claims
- 2588US7269257B2System and method for processing information using encryption key blockSONY CORP·Filed 2001·Granted Sep 11, 2007·24 cites·40 claims
- 2688US7224804B2Information processing device, information processing method, and program storage mediumSONY CORP·Filed 2001·Granted May 29, 2007·59 cites·11 claims
- 2788US7167564B2Information processing system and methodSONY CORP·Filed 2001·Granted Jan 23, 2007·51 cites·17 claims
- 2887US8005214B2Data transmission systemSONY CORP·Filed 2009·Granted Aug 23, 2011·3 cites·17 claims
- 2987US7346170B2Information processing system and methodSONY CORP·Filed 2001·Granted Mar 18, 2008·56 cites·17 claims
- 3087US7065214B2Information processing apparatus, information processing method, information processing system and recording mediumSONY CORP·Filed 2002·Granted Jun 20, 2006·42 cites·6 claims
- 3186US8594325B2Enciphering apparatus and method, deciphering apparatus and method as well as information processing apparatus and methodISHIGURO RYUJI·Filed 2012·Granted Nov 26, 2013·5 cites·33 claims
- 3286US7860248B2Enciphering apparatus and method, deciphering apparatus and method as well as information processing apparatus and methodSONY CORP·Filed 2007·Granted Dec 28, 2010·7 cites·8 claims
- 3386US7216368B2Information processing apparatus for watermarking digital contentSONY CORP·Filed 2002·Granted May 8, 2007·46 cites·9 claims
- 3485US5883958AMethod and device for data decryption, a method and device for device identification, a recording medium, a method of disk production, and a method and apparatus for disk recordingSONY CORP·Filed 1997·Granted Mar 16, 1999·156 cites·23 claims
- 3584US7346169B2Information processing device and methodSONY CORP·Filed 2001·Granted Mar 18, 2008·19 cites·2 claims
- 3683US7134023B2Data transmission systemSONY CORP·Filed 2005·Granted Nov 7, 2006·2 cites·1 claims
- 3783US6911974B2Information processing system and methodSONY CORP·Filed 2001·Granted Jun 28, 2005·33 cites·27 claims
- 3882US7233665B1Enciphering apparatus and method, deciphering apparatus and method as well as information processing apparatus and methodSONY CORP·Filed 2006·Granted Jun 19, 2007·5 cites·25 claims
- 3981US7738662B2Information processing system and methodSONY CORP·Filed 2006·Granted Jun 15, 2010·8 cites·9 claims
- 4080US7913315B2Recording apparatus that records information for protecting intangible property right, recording method thereof, record medium thereof, and program thereofSONY CORP·Filed 2007·Granted Mar 22, 2011·3 cites·26 claims
- 4180US7801819B2Rendering rights delegation system and methodSONY CORP·Filed 2004·Granted Sep 21, 2010·28 cites·17 claims
- 4279US7503073B2Information managing apparatus and method, recording medium, and programSONY CORP·Filed 2003·Granted Mar 10, 2009·11 cites·6 claims
- 4379US7283633B2Information recording and/or reproducing method and information recording and/or reproducing deviceSONY CORP·Filed 2001·Granted Oct 16, 2007·14 cites·27 claims
- 4478US8923511B2Enciphering apparatus and method, deciphering apparatus and method as well as information processing apparatus and methodSONY CORP·Filed 2013·Granted Dec 30, 2014·2 cites·25 claims
- 4578US7765604B2Information processing method, information processing apparatus and recording mediumSONY CORP·Filed 2007·Granted Jul 27, 2010·8 cites·8 claims
- 4678US7093128B2Information recording/reproducing apparatus and methodSONY CORP·Filed 2001·Granted Aug 15, 2006·27 cites·100 claims
- 4777US8325919B2Streaming system for distributing encrypted compressed image data, and streaming method thereforTADA KEIKO·Filed 2008·Granted Dec 4, 2012·4 cites·12 claims
- 4877US7325139B2Information processing device, method, and programSONY CORP·Filed 2003·Granted Jan 29, 2008·25 cites·8 claims
- 4977US7073060B2Data transmission systemSONY CORP·Filed 2005·Granted Jul 4, 2006·1 cites·1 claims
- 5077US5796839AEncryption method, encryption apparatus, recording method, decoding method, decoding apparatus and recording mediumSONY CORP·Filed 1996·Granted Aug 18, 1998·95 cites·37 claims
Showing the top 50 of 92 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →