Inventor · disambiguated record
Kenichi Utsumi
Also filed as: UTSUMI KENICHI
50 granted patents·1 pending application·1,901 citations·filing 1988–2013
99Inventor score
Top patents by PatentIndex Score
51 records- 0195US5857021ASecurity system for protecting information stored in portable storage mediaFUJITSU LTD·Filed 1996·Granted Jan 5, 1999·264 cites·14 claims
- 0294US5357431ACharacter string retrieval system using index and unit for making the indexFUJITSU LTD·Filed 1993·Granted Oct 18, 1994·280 cites·31 claims
- 0394US5327411AWrite control method and apparatus for writing optical disk dataFUJITSU LTD·Filed 1992·Granted Jul 5, 1994·73 cites·28 claims
- 0493US7302581B2Storing apparatus and password control methodFUJITSU LTD·Filed 2005·Granted Nov 27, 2007·14 cites·17 claims
- 0593US5982886AUnauthorized use preventing method for optical disks, optical disk having unauthorized use prevention function, and optical disk apparatusFUJITSU LTD·Filed 1996·Granted Nov 9, 1999·76 cites·6 claims
- 0693US5418852AUnauthorized use prevention method for optical disks, optical disk having unauthorized use prevention function, and optical disk apparatusFUJITSU LTD·Filed 1993·Granted May 23, 1995·183 cites·53 claims
- 0792US6425723B1Loading deviceFUJITSU LTD·Filed 2000·Granted Jul 30, 2002·36 cites·3 claims
- 0891US4947372AOptical information memory medium for recording and erasing informationFUJITSU LTD·Filed 1989·Granted Aug 7, 1990·35 cites·8 claims
- 0989US5886979AInformation recording medium and method for recording and reproducing information to a medium to prevent unauthorized copyingFUJITSU LIMITD·Filed 1997·Granted Mar 23, 1999·75 cites·21 claims
- 1082US5684785AOptical disk and method of preventing fraudulent use of optical disk rotation synchronous control systemFUJITSU LTD·Filed 1995·Granted Nov 4, 1997·38 cites·22 claims
- 1180US5537636AFile management system for a partially rewritable storage medium where file management information is created in a rewritable zone based on medium management information in a read only zoneFUJITSU LTD·Filed 1995·Granted Jul 16, 1996·93 cites·32 claims
- 1279US5623548ATransformation pattern generating device and encryption function deviceFUJITSU LTD·Filed 1995·Granted Apr 22, 1997·119 cites·16 claims
- 1379US4889746AProcess for manufacturing an optical recording mediumFUJITSU LTD·Filed 1988·Granted Dec 26, 1989·25 cites·25 claims
- 1475US5617393AOptical disk having an erased-state indicator and optical disk apparatus for reducing frequency of disk erasing operationFUJITSU LTD·Filed 1994·Granted Apr 1, 1997·53 cites·15 claims
- 1574US5875247ASystem for decrypting encrypted softwareFUJITSU LTD·Filed 1995·Granted Feb 23, 1999·71 cites·27 claims
- 1673US6717766B2Automatic changer for cartridge-type recording mediumFUJITSU LTD·Filed 2002·Granted Apr 6, 2004·11 cites·11 claims
- 1771US5872751ALibrary apparatus and a method for assembly thereofFUJITSU LTD·Filed 1997·Granted Feb 16, 1999·26 cites·40 claims
- 1869US5940243ACartridge direct entry/exit station for library apparatusFUJITSU LTD·Filed 1998·Granted Aug 17, 1999·23 cites·14 claims
- 1969US5752009ARecording medium for electronic publications including multiple format emulationFUJITSU LTD·Filed 1996·Granted May 12, 1998·54 cites·42 claims
- 2067US6428125B1Deck apparatus equipped with a lock mechanismFUJITSU LTD·Filed 2000·Granted Aug 6, 2002·6 cites·4 claims
- 2166US5967339APositional correction relative-flag structure of cartridge storage rack in library apparatus, and library apparatusFUJITSU LTD·Filed 1998·Granted Oct 19, 1999·19 cites·3 claims
- 2266US5058061AMethod for recording information in an optical information memory medium including indium (in) and antimony (sb)FUJITSU LTD·Filed 1989·Granted Oct 15, 1991·10 cites·5 claims
- 2365US6999947B2License devolution apparatusFUJITSU LTD·Filed 1998·Granted Feb 14, 2006·47 cites·10 claims
- 2464US6449223B1Library apparatus for disc cartridgeFUJITSU LTD·Filed 1998·Granted Sep 10, 2002·18 cites·10 claims
- 2564US6144520AMagnetic tape machineFUJITSU LTD·Filed 1997·Granted Nov 7, 2000·14 cites·4 claims
- 2664US6088189ACartridge entry/exit station for a library apparatusFUJITSU LTD·Filed 1998·Granted Jul 11, 2000·19 cites·11 claims
- 2763US7768733B2Method for erasing data from magnetic tape storage mediaFUJITSU LTD·Filed 2005·Granted Aug 3, 2010·1 cites·7 claims
- 2862US7165267B1Storing apparatus and password control methodFUJITSU LTD·Filed 1998·Granted Jan 16, 2007·13 cites·18 claims
- 2961US7139147B2Apparatus and method for drive control, and computer productFUJITSU LTD·Filed 2005·Granted Nov 21, 2006·3 cites·6 claims
- 3061US5963514AAccessor position alignment in a library apparatusFUJITSU LTD·Filed 1998·Granted Oct 5, 1999·16 cites·5 claims
- 3161US5072423AOptical information memory medium recording and erasing information including gallium and antimonyFUJITSU LTD·Filed 1991·Granted Dec 10, 1991·9 cites·4 claims
- 3259US5432656ALibrary apparatus having recording medium entry and ejection unitsFUJITSU LTD·Filed 1993·Granted Jul 11, 1995·10 cites·10 claims
- 3357US5708650AMultiple format interchangeable optical recording medium and method of controlling sameFUJITSU LTD·Filed 1996·Granted Jan 13, 1998·31 cites·16 claims
- 3456US6198594B1Cartridge forced exit station for a library apparatusFUJITSU LTD·Filed 1998·Granted Mar 6, 2001·13 cites·8 claims
- 3555US5138572AOptical information memory medium including indium (In) and bismuth (Bi)FUJITSU LTD·Filed 1991·Granted Aug 11, 1992·12 cites·4 claims
- 3653US2015372331A1High-concentration vanadium electrolytic solution, and method and device for producing the sameGALAXY CO LTD·Filed 2013·Application pending·0 cites
- 3752US6278984B1Software processing apparatus writing software to a medium only if identification information in the software corresponds to identification information in the mediumFUJITSU LTD·Filed 1995·Granted Aug 21, 2001·26 cites·10 claims
- 3848US6290072B1Library apparatusFUJITSU LTD·Filed 1998·Granted Sep 18, 2001·9 cites·10 claims
- 3946US6189014B1File management method for interchangeable storage mediaFUJITSU LTD·Filed 1996·Granted Feb 13, 2001·18 cites·16 claims
- 4046US5144618AOptical disc mediumFUJITSU LTD·Filed 1989·Granted Sep 1, 1992·6 cites·9 claims
- 4146US4984232ACompatible optical diskFUJITSU LTD·Filed 1989·Granted Jan 8, 1991·6 cites·12 claims
- 4245US5422871AMethod and apparatus for producing an optical disk having a read-only area and a rewritable areaFUJITSU LTD·Filed 1993·Granted Jun 6, 1995·16 cites·8 claims
- 4343US8238204B2Apparatus and method for managing key in library apparatusITOU YOSHIHARU·Filed 2007·Granted Aug 7, 2012·0 cites·6 claims
- 4442US5777965AOptical disk having an erased-state indicator and optical disk apparatus for reducing frequency of disk-erasing operationsFUJITSU LTD·Filed 1996·Granted Jul 7, 1998·11 cites·21 claims
- 4538US6023391AMagnetic tape machineFUJITSU LTD·Filed 1997·Granted Feb 8, 2000·3 cites·9 claims
- 4638US5809300ARemovable storage medium and computer system using the sameFUJITSU LTD·Filed 1993·Granted Sep 15, 1998·10 cites·3 claims
- 4736US5654838ALibrary apparatus having recording medium entry and ejection unitsFUJITSU LTD·Filed 1994·Granted Aug 5, 1997·2 cites·10 claims
- 4834US6061321ADeck lock mechanism and library apparatusFUJITSU LTD·Filed 1998·Granted May 9, 2000·2 cites·5 claims
- 4933US6040956ACartridge insertion/discharge opening structure of recording/reproduction unit for library apparatusFUJITSU LTD·Filed 1998·Granted Mar 21, 2000·1 cites·5 claims
- 5032US5157647ALoading and unloading apparatus for a cartridgeFUJITSU LTD·Filed 1990·Granted Oct 20, 1992·1 cites·7 claims
Showing the top 50 of 51 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →