Inventor
UTSUMI KENICHI
JP50 patents
⚠️ This page may combine multiple inventors who share the name “UTSUMI KENICHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FUJITSU LTD
48 patentsUS5857021AJan 5, 1999
Security system for protecting information stored in portable storage media
FUJITSU LTD264 citations99
US5623548AApr 22, 1997
Transformation pattern generating device and encryption function device
FUJITSU LTD119 citations98
US5418852AMay 23, 1995
Unauthorized use prevention method for optical disks, optical disk having unauthorized use prevention function, and optical disk apparatus
FUJITSU LTD183 citations98
US5875247AFeb 23, 1999
System for decrypting encrypted software
FUJITSU LTD71 citations96
US5752009AMay 12, 1998
Recording medium for electronic publications including multiple format emulation
FUJITSU LTD54 citations96
US5617393AApr 1, 1997
Optical disk having an erased-state indicator and optical disk apparatus for reducing frequency of disk erasing operation
FUJITSU LTD53 citations96
US5537636AJul 16, 1996
File 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 zone
FUJITSU LTD93 citations96
US5357431AOct 18, 1994
Character string retrieval system using index and unit for making the index
FUJITSU LTD280 citations96
US5327411AJul 5, 1994
Write control method and apparatus for writing optical disk data
FUJITSU LTD73 citations96
US5982886ANov 9, 1999
Unauthorized use preventing method for optical disks, optical disk having unauthorized use prevention function, and optical disk apparatus
FUJITSU LTD76 citations95
US4947372AAug 7, 1990
Optical information memory medium for recording and erasing information
FUJITSU LTD35 citations95
US6425723B1Jul 30, 2002
Loading device
FUJITSU LTD36 citations93
US5708650AJan 13, 1998
Multiple format interchangeable optical recording medium and method of controlling same
FUJITSU LTD31 citations93
US6999947B2Feb 14, 2006
License devolution apparatus
FUJITSU LTD47 citations92
US6278984B1Aug 21, 2001
Software processing apparatus writing software to a medium only if identification information in the software corresponds to identification information in the medium
FUJITSU LTD26 citations92
US5967339AOct 19, 1999
Positional correction relative-flag structure of cartridge storage rack in library apparatus, and library apparatus
FUJITSU LTD19 citations91
US5940243AAug 17, 1999
Cartridge direct entry/exit station for library apparatus
FUJITSU LTD23 citations91
US5684785ANov 4, 1997
Optical disk and method of preventing fraudulent use of optical disk rotation synchronous control system
FUJITSU LTD38 citations91
US4889746ADec 26, 1989
Process for manufacturing an optical recording medium
FUJITSU LTD25 citations91
US5872751AFeb 16, 1999
Library apparatus and a method for assembly thereof
FUJITSU LTD26 citations89
US7302581B2Nov 27, 2007
Storing apparatus and password control method
FUJITSU LTD14 citations84
US7165267B1Jan 16, 2007
Storing apparatus and password control method
FUJITSU LTD13 citations84
US6189014B1Feb 13, 2001
File management method for interchangeable storage media
FUJITSU LTD18 citations84
US6449223B1Sep 10, 2002
Library apparatus for disc cartridge
FUJITSU LTD18 citations83
US6088189AJul 11, 2000
Cartridge entry/exit station for a library apparatus
FUJITSU LTD19 citations83
US6144520ANov 7, 2000
Magnetic tape machine
FUJITSU LTD14 citations81
US5138572AAug 11, 1992
Optical information memory medium including indium (In) and bismuth (Bi)
FUJITSU LTD12 citations81
US5809300ASep 15, 1998
Removable storage medium and computer system using the same
FUJITSU LTD10 citations74
US5422871AJun 6, 1995
Method and apparatus for producing an optical disk having a read-only area and a rewritable area
FUJITSU LTD16 citations74
US6290072B1Sep 18, 2001
Library apparatus
FUJITSU LTD9 citations73
US6198594B1Mar 6, 2001
Cartridge forced exit station for a library apparatus
FUJITSU LTD13 citations73
US5963514AOct 5, 1999
Accessor position alignment in a library apparatus
FUJITSU LTD16 citations73
US5777965AJul 7, 1998
Optical disk having an erased-state indicator and optical disk apparatus for reducing frequency of disk-erasing operations
FUJITSU LTD11 citations73
US5432656AJul 11, 1995
Library apparatus having recording medium entry and ejection units
FUJITSU LTD10 citations73
US5072423ADec 10, 1991
Optical information memory medium recording and erasing information including gallium and antimony
FUJITSU LTD9 citations73
US5058061AOct 15, 1991
Method for recording information in an optical information memory medium including indium (in) and antimony (sb)
FUJITSU LTD10 citations73
US6717766B2Apr 6, 2004
Automatic changer for cartridge-type recording medium
FUJITSU LTD11 citations71
US6428125B1Aug 6, 2002
Deck apparatus equipped with a lock mechanism
FUJITSU LTD6 citations63
US6061321AMay 9, 2000
Deck lock mechanism and library apparatus
FUJITSU LTD2 citations62
US5654838AAug 5, 1997
Library apparatus having recording medium entry and ejection units
FUJITSU LTD2 citations62
US5144618ASep 1, 1992
Optical disc medium
FUJITSU LTD6 citations62
US4984232AJan 8, 1991
Compatible optical disk
FUJITSU LTD6 citations62
US6023391AFeb 8, 2000
Magnetic tape machine
FUJITSU LTD3 citations61
US7139147B2Nov 21, 2006
Apparatus and method for drive control, and computer product
FUJITSU LTD3 citations59
US6040956AMar 21, 2000
Cartridge insertion/discharge opening structure of recording/reproduction unit for library apparatus
FUJITSU LTD1 citations52
US5157647AOct 20, 1992
Loading and unloading apparatus for a cartridge
FUJITSU LTD1 citations52
US7768733B2Aug 3, 2010
Method for erasing data from magnetic tape storage media
FUJITSU LTD1 citations48
US6195223B1Feb 27, 2001
Cartridge insertion/discharge opening structure of recording/reproduction unit for library apparatus, and library apparatus
FUJITSU LTD0 citations41