Inventor
NAKAHARA MASARU
JP11 patents
⚠️ This page may combine multiple inventors who share the name “NAKAHARA MASARU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FUJITSU LTD
7 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
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
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
US5777965AJul 7, 1998
Optical disk having an erased-state indicator and optical disk apparatus for reducing frequency of disk-erasing operations
FUJITSU LTD11 citations73