P

Inventor

AKIYAMA RYOTA

JP44 patents
⚠️ This page may combine multiple inventors who share the name “AKIYAMA RYOTA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

FUJITSU LTD

40 patents
US5805699ASep 8, 1998

Software copying system

FUJITSU LTD202 citations99
US5796824AAug 18, 1998

Storage medium for preventing an irregular use by a third party

FUJITSU LTD163 citations99
US5737413AApr 7, 1998

Information distribution system wherein storage medium storing ciphered information is distributed

FUJITSU LTD180 citations99
US5555304ASep 10, 1996

Storage medium for preventing an illegal use by a third party

FUJITSU LTD109 citations99
US5539825AJul 23, 1996

Electronic cashless transaction system

FUJITSU LTD327 citations99
US5428684AJun 27, 1995

Electronic cashless transaction system

FUJITSU LTD275 citations99
US5392351AFeb 21, 1995

Electronic data protection system

FUJITSU LTD373 citations99
US6700989B1Mar 2, 2004

Device for generating, detecting, recording, and reproducing a watermarked moving image having a copy preventing capability and storage medium for storing program or the moving image

FUJITSU LTD192 citations98
US5623548AApr 22, 1997

Transformation pattern generating device and encryption function device

FUJITSU LTD119 citations98
US5784464AJul 21, 1998

System for and method of authenticating a client

FUJITSU LTD305 citations97
US5812661ASep 22, 1998

Software reproduction apparatus

FUJITSU LTD59 citations96
US5584022ADec 10, 1996

Enciphered file sharing method

FUJITSU LTD66 citations96
US5499299AMar 12, 1996

Modular arithmetic operation system

FUJITSU LTD101 citations96
US5440631AAug 8, 1995

Information distribution system wherein storage medium storing ciphered information is distributed

FUJITSU LTD55 citations96
US5386468AJan 31, 1995

Method of registering identification number in personal communication terminal

FUJITSU LTD138 citations96
US5325433AJun 28, 1994

Encryption communication system

FUJITSU LTD64 citations96
US6460137B1Oct 1, 2002

Encryption processing system

FUJITSU LTD69 citations95
US5832210ANov 3, 1998

Device and method for controlling communication

FUJITSU LTD72 citations95
US5787179AJul 28, 1998

Scrambling and descrambling of data with improved security

FUJITSU LTD68 citations94
US6636970B2Oct 21, 2003

Software encoding using a combination of two types of encoding and encoding type identification information

FUJITSU LTD27 citations93
US6067640AMay 23, 2000

System for management of software employing memory for processing unit with regulatory information, for limiting amount of use and number of backup copies of software

FUJITSU LTD19 citations93
US5822771AOct 13, 1998

System for management of software employing memory for processing unit with regulatory information, for limiting amount of use and number of backup copies of software

FUJITSU LTD33 citations93
US5812663ASep 22, 1998

Data reproducing device

FUJITSU LTD27 citations93
US5768387AJun 16, 1998

Key authentication method and key authentication apparatus

FUJITSU LTD35 citations93
US5737415AApr 7, 1998

Data management module, data reproduction management device and data reproduction management system

FUJITSU LTD34 citations93
US5680453AOct 21, 1997

Software delivery system, center device, relaying device and user terminal device

FUJITSU LTD38 citations93
US7013392B1Mar 14, 2006

File processing unit

FUJITSU LTD24 citations92
US7000114B1Feb 14, 2006

Apparatus to create and/or verify digital signatures having a secure time element and an identifier of the apparatus

FUJITSU LTD40 citations92
US4959863ASep 25, 1990

Secret speech equipment

FUJITSU LTD27 citations92
US6144745ANov 7, 2000

Method of and apparatus for retaining and verifying of data on recording medium

FUJITSU LTD33 citations90
US7512801B1Mar 31, 2009

Authentication system, authentication method, signing apparatus, signing method, certifying apparatus, certifying method, and a computer-readable recording medium with a program making a computer execute the method recording therein

FUJITSU LTD11 citations84
US6944734B2Sep 13, 2005

Storage apparatus and access control method

FUJITSU LTD18 citations83
US7154824B2Dec 26, 2006

Storage apparatus

FUJITSU LTD7 citations74
US5774651AJun 30, 1998

False statement detection system

FUJITSU LTD12 citations74
US7421078B2Sep 2, 2008

Valid medium management system

FUJITSU LTD4 citations63
USRE39802EAug 28, 2007

Storage medium for preventing an irregular use by a third party

FUJITSU LTD2 citations63
US7010127B2Mar 7, 2006

Cryptographic communication method, file access system and recording medium

FUJITSU LTD2 citations62
US5065430ANov 12, 1991

Voice band splitting scrambler

FUJITSU LTD6 citations62
USRE40547EOct 21, 2008

Software reproduction apparatus

FUJITSU LTD0 citations52
US7555651B2Jun 30, 2009

Time management apparatus and time management method

FUJITSU LTD0 citations51

3M INNOVATIVE PROPERTIES CO

1 patent

CITIZEN HOLDINGS CO LTD

1 patent

KANEKA CORP

1 patent

FUJITSU BROAD SOLUTION & CONSULTING INC

1 patent