Inventor
SASAKI RYOICHI
JP77 patents
⚠️ This page may combine multiple inventors who share the name “SASAKI RYOICHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
35 patentsUS6889211B1May 3, 2005
Method and system for distributing multimedia data with management information
HITACHI LTD540 citations99
US5018196AMay 21, 1991
Method for electronic transaction with digital signature
HITACHI LTD259 citations99
US6499105B1Dec 24, 2002
Digital data authentication method
HITACHI LTD174 citations98
US6131162AOct 10, 2000
Digital data authentication method
HITACHI LTD388 citations98
US4885788ADec 5, 1989
IC card
HITACHI LTD139 citations97
US5483631AJan 9, 1996
Communication network management system for displaying operation states of network elements on a remote display unit
HITACHI LTD181 citations96
US5117458AMay 26, 1992
Secret information service system and method
HITACHI LTD111 citations96
US4777585AOct 11, 1988
Analogical inference method and apparatus for a control system
HITACHI LTD131 citations96
US6775775B1Aug 10, 2004
Method of physical individual authentication and system using the same
HITACHI LTD66 citations95
US5103479AApr 7, 1992
Encipher method and decipher method
HITACHI LTD45 citations95
US4947447AAug 7, 1990
Method for data coding
HITACHI LTD71 citations95
US4885777ADec 5, 1989
Electronic transaction system
HITACHI LTD154 citations95
US4831659AMay 16, 1989
Method for image data coding
HITACHI LTD86 citations95
US5031211AJul 9, 1991
Communication circuit switching or parallel operation system
HITACHI LTD82 citations94
US4920529AApr 24, 1990
Network control method and apparatus therefor
HITACHI LTD67 citations94
US4876681AOct 24, 1989
Packet switching equipment and a packet switching method for controlling packet switched networks
HITACHI LTD89 citations94
US7526645B2Apr 28, 2009
Electronic document authenticity assurance method and electronic document disclosure system
HITACHI LTD31 citations92
US7200682B2Apr 3, 2007
Time stamp generating system
HITACHI LTD21 citations92
US7134021B2Nov 7, 2006
Method and system for recovering the validity of cryptographically signed digital data
HITACHI LTD16 citations92
US5204955AApr 20, 1993
Network management method and system
HITACHI LTD78 citations92
US5058186AOct 15, 1991
Method and apparatus for image compression
HITACHI LTD22 citations92
US4982429AJan 1, 1991
Encipher method and decipher method
HITACHI LTD22 citations92
US4979995ADec 25, 1990
Member made of nickel base alloy having high resistance to stress corrosion cracking and method of producing same
HITACHI LTD30 citations92
US4901313AFeb 13, 1990
A-point to multi-points communication system
HITACHI LTD32 citations92
US7305558B1Dec 4, 2007
Digital signing method
HITACHI LTD38 citations91
US6816969B2Nov 9, 2004
Digital signature generating method and digital signature verifying method
HITACHI LTD41 citations91
US6327658B1Dec 4, 2001
Distributed object system and service supply method therein
HITACHI LTD36 citations91
US7047412B2May 16, 2006
Digital watermark data embedding method, and digital watermark data embeddability analyzing method
HITACHI LTD19 citations82
US6865677B1Mar 8, 2005
Contents rendering control method, contents reproducing equipment, and contents distribution equipment
HITACHI LTD15 citations82
US4969190ANov 6, 1990
Encrypting system of data
HITACHI LTD21 citations81
US7694126B2Apr 6, 2010
Method and system for recovering the validity of cryptographically signed digital data
HITACHI LTD7 citations73
US4477280AOct 16, 1984
Heat resisting steel
HITACHI LTD17 citations73
US4043945AAug 23, 1977
Method of producing thin layer methanation reaction catalyst
HITACHI LTD11 citations73
US7770009B2Aug 3, 2010
Digital signing method
HITACHI LTD6 citations72
US5504676AApr 2, 1996
Slip processing method processing data from slips with varying formats
HITACHI LTD13 citations71
BROTHER IND LTD
8 patentsUS5107423AApr 21, 1992
Document processing device with merge function
BROTHER IND LTD25 citations89
US5167017ANov 24, 1992
Text editing device
BROTHER IND LTD11 citations74
US4951226AAug 21, 1990
Character display device with reversing and underlining effects
BROTHER IND LTD11 citations74
US4934851AJun 19, 1990
Text processing system including plural text and corresponding memories
BROTHER IND LTD7 citations74
US4916656AApr 10, 1990
Text processing system having search-and-replace function for both character and attribute data
BROTHER IND LTD13 citations74
US4837709AJun 6, 1989
Recording apparatus with a function of determining recording direction of explanatory characters for graph
BROTHER IND LTD8 citations74
US4627748ADec 9, 1986
Writing-plotting apparatus with keyboard
BROTHER IND LTD10 citations74
US4830521AMay 16, 1989
Electronic typewriter with a spelling check function and proper noun recognition
BROTHER IND LTD9 citations72
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD
2 patentsUS5767845AJun 16, 1998
Multi-media information record device, and a multi-media information playback device
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD49 citations96
USRE39652EMay 22, 2007
Multi-media information record device, and a multi-media information playback device
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD5 citations63
KEYENCE CO LTD
2 patentsNIPPON ELECTRIC IND
1 patentKURARAY CO
1 patentYOSHIDA KENTARO
1 patentShowing the top 50 of 77 patents by PatentIndex Score.