P

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 patents
US6889211B1May 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 patents

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD

2 patents

KEYENCE CO LTD

2 patents

NIPPON ELECTRIC IND

1 patent

KURARAY CO

1 patent

YOSHIDA KENTARO

1 patent

Showing the top 50 of 77 patents by PatentIndex Score.