Inventor
ITAMI SATOSHI
JP14 patents
Patents
14 patentsUS5418852AMay 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
US5617393AApr 1, 1997
Optical disk having an erased-state indicator and optical disk apparatus for reducing frequency of disk erasing operation
FUJITSU LTD53 citations96
US5357431AOct 18, 1994
Character string retrieval system using index and unit for making the index
FUJITSU LTD280 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
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
US5684785ANov 4, 1997
Optical disk and method of preventing fraudulent use of optical disk rotation synchronous control system
FUJITSU LTD38 citations91
US5809300ASep 15, 1998
Removable storage medium and computer system using the same
FUJITSU LTD10 citations74
US6185166B1Feb 6, 2001
Optical information recording/reproducing apparatus
FUJITSU LTD6 citations73
US6011764AJan 4, 2000
Optical disk and optical disk apparatus
FUJITSU LTD12 citations73
US5793725AAug 11, 1998
Optical information recording/reproducing apparatus having a composite prism with a plurality of emission surfaces
FUJITSU LTD6 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
US5623462AApr 22, 1997
Optical information recording/reproducing apparatus
FUJITSU LTD15 citations73
US6339564B2Jan 15, 2002
Optical information recording/reproducing apparatus
FUJITSU LTD5 citations62