Inventor · disambiguated record
Keiichi Iwamura
Also filed as: IWAMURA KEIICHI
90 granted patents·17 pending applications·3,694 citations·filing 1986–2020
99Inventor score
Top patents by PatentIndex Score
107 records- 0198US6425081B1Electronic watermark system electronic information distribution system and image filing apparatusCANON KK·Filed 1998·Granted Jul 23, 2002·389 cites·9 claims
- 0291US7536026B2Image processing apparatus and methodCANON KK·Filed 2007·Granted May 19, 2009·21 cites·9 claims
- 0391US7171021B2Data processing apparatus and method, and storage medium thereforCANON KK·Filed 2005·Granted Jan 30, 2007·27 cites·6 claims
- 0491US6807285B1Embedding information in digital image dataCANON KK·Filed 1999·Granted Oct 19, 2004·110 cites·48 claims
- 0590US6707465B2Data processing apparatus and method, and storage mediumCANON KK·Filed 2001·Granted Mar 16, 2004·58 cites·20 claims
- 0688US6560339B1Electronic watermarking method, digital information distribution system using such method, and storage medium storing program of such methodCANON KK·Filed 1999·Granted May 6, 2003·108 cites·11 claims
- 0787US6826290B1Image processing apparatus and method and storage mediumCANON KK·Filed 2000·Granted Nov 30, 2004·45 cites·30 claims
- 0887US6741758B2Image processor and image processing methodCANON KK·Filed 2001·Granted May 25, 2004·42 cites·24 claims
- 0986US7530031B2Character input deviceFUJITSU LTD·Filed 2003·Granted May 5, 2009·50 cites·14 claims
- 1086US7142689B2Image processing apparatus for determining specific imagesCANON KK·Filed 2001·Granted Nov 28, 2006·63 cites·29 claims
- 1186US6674874B1Data processing apparatus and method and storage mediumCANON KK·Filed 1999·Granted Jan 6, 2004·125 cites·22 claims
- 1285US7386149B2Method and apparatus for embedding digital-watermark using robustness parameterCANON KK·Filed 2007·Granted Jun 10, 2008·7 cites·12 claims
- 1385US7106906B2Moving image generation apparatus, moving image playback apparatus, their control method, and storage mediumCANON KK·Filed 2001·Granted Sep 12, 2006·23 cites·39 claims
- 1485US6801636B2Image processing apparatus and method, and storage mediumCANON KK·Filed 2001·Granted Oct 5, 2004·28 cites·35 claims
- 1585US5909238AImage transmission system with billing based on the kind of MPEG frame transmittedCANON KK·Filed 1996·Granted Jun 1, 1999·76 cites·93 claims
- 1685US4747103ASignal processing apparatus for correcting decoding errorsCANON KK·Filed 1986·Granted May 24, 1988·49 cites·6 claims
- 1784US6535616B1Information processing apparatus, method and memory medium thereforCANON KK·Filed 1999·Granted Mar 18, 2003·82 cites·32 claims
- 1883US7206432B2Extracting embedded information from digital image dataCANON KK·Filed 2004·Granted Apr 17, 2007·19 cites·18 claims
- 1983US6307940B1Communication network for encrypting/deciphering communication text while updating encryption key, a communication terminal thereof, and a communication method thereofCANON KK·Filed 1998·Granted Oct 23, 2001·133 cites·19 claims
- 2083US6088454AKey management method, encryption system, and sharing digital signature system which have hierarchiesCANON KK·Filed 1997·Granted Jul 11, 2000·133 cites·15 claims
- 2182US6516318B2Management system and terminal apparatus to manage and control distribution and use of software and the likeCANON KK·Filed 2000·Granted Feb 4, 2003·29 cites·12 claims
- 2282US5600720AEncryption apparatus, communication system using the same and method thereforCANON KK·Filed 1994·Granted Feb 4, 1997·102 cites·16 claims
- 2381US7181043B2Data processing method and apparatusCANON KK·Filed 2005·Granted Feb 20, 2007·5 cites·6 claims
- 2481US6922777B1Apparatus, computer medium, and method for embedding and extracting a first and second data into a watermarkCANON KK·Filed 2000·Granted Jul 26, 2005·24 cites·30 claims
- 2581US6144946AAccounting device, communicating apparatus, and communication systemCANON KK·Filed 1997·Granted Nov 7, 2000·245 cites·27 claims
- 2681US5708714AMethod for sharing secret information and performing certification in a communication system that has a plurality of information processing apparatusesCANON KK·Filed 1995·Granted Jan 13, 1998·145 cites·31 claims
- 2781US5666419AEncryption device and communication apparatus using sameCANON KK·Filed 1994·Granted Sep 9, 1997·86 cites·18 claims
- 2881US5321752AMethod of and apparatus for encryption and decryption of communication dataCANON KK·Filed 1992·Granted Jun 14, 1994·87 cites·20 claims
- 2980US6434253B1Data processing apparatus and method and storage mediumCANON KK·Filed 1999·Granted Aug 13, 2002·67 cites·17 claims
- 3078US7613350B2Moving image generation apparatus, moving image playback apparatus, their control method, and storage mediumCANON KABUSHIKI KAISA·Filed 2005·Granted Nov 3, 2009·4 cites·7 claims
- 3178US6959385B2Image processor and image processing methodCANON KK·Filed 2001·Granted Oct 25, 2005·26 cites·15 claims
- 3277US7552335B2Information processing apparatus, method therefor, computer program, and computer-readable storage mediumCANON KK·Filed 2003·Granted Jun 23, 2009·15 cites·7 claims
- 3377US7535488B2Image data verification systemCANON KK·Filed 2001·Granted May 19, 2009·15 cites·26 claims
- 3477US7158652B2Method of using plural watermarks to prevent unauthorized image copyingCANON KK·Filed 2001·Granted Jan 2, 2007·15 cites·36 claims
- 3575US7571323B2Image processor, method thereof, computer program, and computer readable storage mediumCANON KK·Filed 2004·Granted Aug 4, 2009·12 cites·8 claims
- 3674US8055900B2Information processing apparatus, information processing system, information processing method, storage medium and programCANON KK·Filed 2006·Granted Nov 8, 2011·6 cites·3 claims
- 3774US7194630B2Information processing apparatus, information processing system, information processing method, storage medium and programCANON KK·Filed 2003·Granted Mar 20, 2007·16 cites·5 claims
- 3874US5742620AGMD decoding apparatus and a method thereforCANON KK·Filed 1996·Granted Apr 21, 1998·38 cites·8 claims
- 3973US7463736B2Data process apparatus and method thereforCANON KK·Filed 2003·Granted Dec 9, 2008·12 cites·10 claims
- 4073US7259878B2Image processing apparatus effective for preventing counterfeiting of a copy-prohibition objectCANON KK·Filed 2001·Granted Aug 21, 2007·11 cites·17 claims
- 4173US7162637B2Image verification systemCANON KK·Filed 2002·Granted Jan 9, 2007·18 cites·30 claims
- 4272US7580543B2Information processing apparatus, method, program and storage mediumCANON KK·Filed 2005·Granted Aug 25, 2009·3 cites·5 claims
- 4372US7461255B2Digital watermark processing apparatus, and digital contents distribution system using the apparatusCANON KK·Filed 2002·Granted Dec 2, 2008·17 cites·9 claims
- 4472US7296161B1Image processing apparatus and image processing methodCANON KK·Filed 2000·Granted Nov 13, 2007·16 cites·32 claims
- 4572US7231522B2Information processing apparatus, method for controlling the same, and storage mediumCANON KK·Filed 2001·Granted Jun 12, 2007·10 cites·19 claims
- 4672US6721438B1Image processing apparatus, image processing method, and storage mediumCANON KK·Filed 2000·Granted Apr 13, 2004·10 cites·6 claims
- 4772US5524090AApparatus for multiplying long integersCANON KK·Filed 1995·Granted Jun 4, 1996·64 cites·10 claims
- 4871US7076720B1Encoding apparatus and decoding apparatusCANON KK·Filed 2000·Granted Jul 11, 2006·15 cites·14 claims
- 4971US6839146B1Image processing method, apparatus, and medium storing program for checking for copy-prohibited objectsCANON KK·Filed 2000·Granted Jan 4, 2005·10 cites·23 claims
- 5071US6449378B1Data processing apparatus and method and storage mediumCANON KK·Filed 1999·Granted Sep 10, 2002·47 cites·6 claims
Showing the top 50 of 107 patent records by PatentIndex Score.
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