Inventor · disambiguated record
Isao Echizen
Also filed as: ECHIZEN ISAO
20 granted patents·9 pending applications·572 citations·filing 1998–2023
96Inventor score
Top patents by PatentIndex Score
29 records- 0190US6418232B1Method of authenticating digital-watermark picturesHITACHI LTD·Filed 1999·Granted Jul 9, 2002·142 cites·11 claims
- 0282US6563935B1Method 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
- 0381US7113613B2Watermark information detection methodHITACHI LTD·Filed 2002·Granted Sep 26, 2006·29 cites·4 claims
- 0481US7047407B2Network system enabling transmission controlHITACHI LTD·Filed 2002·Granted May 16, 2006·35 cites·8 claims
- 0581US6456727B1Method 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
- 0678US7047412B2Digital watermark data embedding method, and digital watermark data embeddability analyzing methodHITACHI LTD·Filed 2001·Granted May 16, 2006·19 cites·12 claims
- 0775US7065226B1Method for embedding information and extracting the sameHITACHI LTD·Filed 2000·Granted Jun 20, 2006·23 cites·6 claims
- 0875US6865677B1Contents rendering control method, contents reproducing equipment, and contents distribution equipmentHITACHI LTD·Filed 2000·Granted Mar 8, 2005·15 cites·23 claims
- 0975US6711276B1Control method and apparatus for embedding information in dataHITACHI LTD·Filed 1999·Granted Mar 23, 2004·57 cites·17 claims
- 1072US6826291B2Method and system for embedding information into contentsHITACHI LTD·Filed 2002·Granted Nov 30, 2004·11 cites·7 claims
- 1170US7478432B2Method and system for contents controlHITACHI LTD·Filed 2002·Granted Jan 13, 2009·16 cites·25 claims
- 1270US7293294B2Method and apparatus for using contentsHITACHI LTD·Filed 2003·Granted Nov 6, 2007·18 cites·20 claims
- 1369US6650763B2Method 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
- 1465US6584210B1Digital watermark image processing methodHITACHI LTD·Filed 1999·Granted Jun 24, 2003·37 cites·12 claims
- 1564US6728408B1Water-mark embedding method and systemHITACHI LTD·Filed 1998·Granted Apr 27, 2004·35 cites·25 claims
- 1657US6970575B2Method of extracting digital watermark information and method of judging bit value of digital watermark informationHITACHI LTD·Filed 2003·Granted Nov 29, 2005·5 cites·11 claims
- 1756US8285998B2Dynamic image content tamper detecting device and systemECHIZEN ISAO·Filed 2007·Granted Oct 9, 2012·2 cites·11 claims
- 1856US7499565B2Method of watermarking for binary imagesHITACHI LTD·Filed 2004·Granted Mar 3, 2009·6 cites·9 claims
- 1956US2024046424A1Image processing program, device, and methodFUJITSU LTD·Filed 2023·Application pending·0 cites
- 2056US2024046704A1Determination method and determination apparatusFUJITSU LTD·Filed 2023·Application pending·0 cites
- 2152US7310428B2Method of detecting digital watermark informationHITACHI LTD·Filed 2003·Granted Dec 18, 2007·4 cites·6 claims
- 2247US7577843B2System and method for controlling contents by plurality of pieces of control informationHITACHI LTD·Filed 2004·Granted Aug 18, 2009·0 cites·3 claims
- 2343US2004025023A1Watermarking application system for broadcast contents copyright protectionFiled 2003·Application pending·0 cites
- 2441US2012315018A1Video image display device, anti-camcording method, and video image display systemGOHSHI SEIICHI·Filed 2011·Application pending·0 cites
- 2541US2012314085A1Video image display screen, video image display system, and method for detecting camera used in illegal camcordingGOHSHI SEIICHI·Filed 2011·Application pending·0 cites
- 2641US2012320106A1Video image display deviceGOHSHI SEIICHI·Filed 2011·Application pending·0 cites
- 2740US2012086862A1Video display device, video display method, video display screen and liquid crystal display deviceGOHSHI SEIICHI·Filed 2010·Application pending·0 cites
- 2839US2004008923A1Method for embedding digital watermark informationFiled 2003·Application pending·0 cites
- 2937US2006015735A1Electronic watermarking method and storage medium for storing electronic watermarking programKUDO KEI·Filed 2005·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →