Inventor · disambiguated record
Hiroshi Yoshiura
Also filed as: YOSHIURA HIROSHI
63 granted patents·9 pending applications·3,211 citations·filing 1984–2011
99Inventor score
Top patents by PatentIndex Score
72 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
- 0397US6310956B1Copy protection apparatus and methodHITACHI LTD·Filed 1999·Granted Oct 30, 2001·168 cites·29 claims
- 0497US6131162ADigital data authentication methodHITACHI LTD·Filed 1998·Granted Oct 10, 2000·388 cites·63 claims
- 0597US4736296AMethod and apparatus of intelligent guidance in natural languageHITACHI LTD·Filed 1984·Granted Apr 5, 1988·250 cites·14 claims
- 0694US7224820B2Electronic document, genuineness management method for print medium thereof, genuineness management system, program, and program recording mediumHITACHI LTD·Filed 2003·Granted May 29, 2007·85 cites·8 claims
- 0792US6122378AData compression/encryption method and systemHITACHI LTD·Filed 1995·Granted Sep 19, 2000·97 cites·6 claims
- 0892US5872530AMethod of and apparatus for compressing and decompressing data and data processing apparatus and network system using the sameHITACHI LTD·Filed 1997·Granted Feb 16, 1999·135 cites·44 claims
- 0990US6954856B1Additional information embedding method, additional information detecting method, additional information embedding apparatus and additional information detecting apparatusHITACHI LTD·Filed 2000·Granted Oct 11, 2005·28 cites·18 claims
- 1090US6418232B1Method of authenticating digital-watermark picturesHITACHI LTD·Filed 1999·Granted Jul 9, 2002·142 cites·11 claims
- 1187US6658135B1Recording deviceHITACHI LTD·Filed 1999·Granted Dec 2, 2003·111 cites·2 claims
- 1285US7779256B2Reproducing apparatus, recording apparatus and display apparatusHITACHI LTD·Filed 2008·Granted Aug 17, 2010·3 cites·3 claims
- 1385US6535614B1Method and apparatus for recording and reproducing electronic watermark information, and recording mediumHITACHI LTD·Filed 1998·Granted Mar 18, 2003·66 cites·2 claims
- 1484US6404781B1Data transmission method for embedded data, data transmitting and reproducing apparatuses and information recording medium thereforHITACHI LTD·Filed 1998·Granted Jun 11, 2002·59 cites·14 claims
- 1582US7526645B2Electronic document authenticity assurance method and electronic document disclosure systemHITACHI LTD·Filed 2004·Granted Apr 28, 2009·31 cites·9 claims
- 1682US6775775B1Method of physical individual authentication and system using the sameHITACHI LTD·Filed 2000·Granted Aug 10, 2004·66 cites·4 claims
- 1782US6578149B1Method for reproducing data, apparatus for reproducing data, method for coding data, method for recording data, apparatus for recording and reproducing data, method for authentication, semiconductor chip, reproducing apparatus, recording apparatus and data processing apparatusHITACHI LTD·Filed 1999·Granted Jun 10, 2003·45 cites·38 claims
- 1882US6563935B1Method of extracting digital watermark information and method of judging bit value of digital watermark informationHITACHI LTD·Filed 1999·Granted May 13, 2003·81 cites·20 claims
- 1981US7113613B2Watermark information detection methodHITACHI LTD·Filed 2002·Granted Sep 26, 2006·29 cites·4 claims
- 2081US6456727B1Method of extracting digital watermark information and method of judging but value of digital watermark informationHITACHI LTD·Filed 2000·Granted Sep 24, 2002·25 cites·6 claims
- 2181US6411714B1Data decompression/decryption method and systemHITACHI LTD·Filed 2000·Granted Jun 25, 2002·17 cites·6 claims
- 2280US6519351B2Method and apparatus for recording and reproducing electronic watermark information, and recording mediumHITACHI LTD·Filed 2001·Granted Feb 11, 2003·20 cites·7 claims
- 2379US7694126B2Method and system for recovering the validity of cryptographically signed digital dataHITACHI LTD·Filed 2005·Granted Apr 6, 2010·7 cites·11 claims
- 2478US7047412B2Digital watermark data embedding method, and digital watermark data embeddability analyzing methodHITACHI LTD·Filed 2001·Granted May 16, 2006·19 cites·12 claims
- 2577US6707927B1Steganographic system, method, program and storage medium thereforHITACHI LTD·Filed 2000·Granted Mar 16, 2004·31 cites·16 claims
- 2675US7200682B2Time stamp generating systemHITACHI LTD·Filed 2002·Granted Apr 3, 2007·21 cites·8 claims
- 2775US7151888B2Method and apparatus for temporarily giving copy permission for reproducing digital signalsHITACHI LTD·Filed 2001·Granted Dec 19, 2006·10 cites·35 claims
- 2875US7065226B1Method for embedding information and extracting the sameHITACHI LTD·Filed 2000·Granted Jun 20, 2006·23 cites·6 claims
- 2975US7043645B2Reproducing apparatus, recording apparatus and display apparatusHITACHI LTD·Filed 2003·Granted May 9, 2006·6 cites·26 claims
- 3075US6865677B1Contents rendering control method, contents reproducing equipment, and contents distribution equipmentHITACHI LTD·Filed 2000·Granted Mar 8, 2005·15 cites·23 claims
- 3175US6711276B1Control method and apparatus for embedding information in dataHITACHI LTD·Filed 1999·Granted Mar 23, 2004·57 cites·17 claims
- 3274US7210043B2Trusted computer systemHITACHI LTD·Filed 2002·Granted Apr 24, 2007·21 cites·16 claims
- 3374US7134021B2Method and system for recovering the validity of cryptographically signed digital dataHITACHI LTD·Filed 2001·Granted Nov 7, 2006·16 cites·40 claims
- 3472US6826291B2Method and system for embedding information into contentsHITACHI LTD·Filed 2002·Granted Nov 30, 2004·11 cites·7 claims
- 3570US7478432B2Method and system for contents controlHITACHI LTD·Filed 2002·Granted Jan 13, 2009·16 cites·25 claims
- 3670US7293294B2Method and apparatus for using contentsHITACHI LTD·Filed 2003·Granted Nov 6, 2007·18 cites·20 claims
- 3769US6690813B2Method and apparatus for recording and reproducing electronic watermark information, and recording mediumHITACHI LTD·Filed 2002·Granted Feb 10, 2004·6 cites·13 claims
- 3869US6650763B2Method of extracting digital watermark information and method of judging bit value of digital watermark informationHITACHI LTD·Filed 2002·Granted Nov 18, 2003·12 cites·6 claims
- 3967US7379547B2Reproducing apparatus, recording apparatus and display apparatusHITACHI LTD·Filed 2003·Granted May 27, 2008·6 cites·33 claims
- 4067US4959799AInference method and systemHITACHI LTD·Filed 1988·Granted Sep 25, 1990·23 cites·19 claims
- 4166US7441115B2Method for verifying a digital signatureHITACHI LTD·Filed 2003·Granted Oct 21, 2008·12 cites·9 claims
- 4266US6865553B2Copy protection apparatus and methodHITACHI LTD·Filed 2001·Granted Mar 8, 2005·6 cites·15 claims
- 4366US6504931B1Method and apparatus for encrypting dataHITACHI LTD·Filed 2000·Granted Jan 7, 2003·10 cites·12 claims
- 4466US5243689ACase-based inference processing methodHITACHI LTD·Filed 1991·Granted Sep 7, 1993·30 cites·18 claims
- 4565US6584210B1Digital watermark image processing methodHITACHI LTD·Filed 1999·Granted Jun 24, 2003·37 cites·12 claims
- 4665US6157720AMethod and apparatus for encrypting dataHITACHI LTD·Filed 1997·Granted Dec 5, 2000·51 cites·36 claims
- 4764US6728408B1Water-mark embedding method and systemHITACHI LTD·Filed 1998·Granted Apr 27, 2004·35 cites·25 claims
- 4863US6990584B1Method of and apparatus for restricting copy of digital information, and apparatus for recording digital informationSONY CORP·Filed 1999·Granted Jan 24, 2006·26 cites·31 claims
- 4963US6311277B1Method and device for managing computer networkHITACHI LTD·Filed 1996·Granted Oct 30, 2001·42 cites·41 claims
- 5062US7317738B2Data transmission method for embedded data, data transmitting and reproducing apparatuses and information recording medium thereforHITACHI LTD·Filed 2001·Granted Jan 8, 2008·5 cites·5 claims
Showing the top 50 of 72 patent records by PatentIndex Score.
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