Inventor

Yasutsugu Kuroda

Inventor

Kawasaki, JP

Overview

1997–2005

Patent span

Electricity

Primary field (CPC H)

Patents· 14 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

H04Lprimary

H04LTransmission of digital information, e.g. telegraphic communication63%

G06FElectric digital data processing11%

G06QInformation and communication technology [ict] specially adapted for administrative, commercial, financial, managerial or supervisory purposes11%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests11%

G11BInformation storage based on relative movement between record carrier and transducer5%

PatentTitleYear

6,922,775'User support system for cryptographic communication in network systems'2005 6,915,434'Electronic data storage apparatus with key management function and electronic data storage method'2005 6,658,403'Apparatus and method for managing electronic original data'2003 6,584,563'User support system for cryptographic communication in network systems'2003 6,505,213'File management apparatus and method'2003 6,470,448'Apparatus and method for proving transaction between users in network environment'2002 6,421,779'Electronic data storage apparatus, system and method'2002 6,345,360'Apparatus method and computer readable storage medium with recorded program for managing files with alteration preventing/detecting functions'2002 6,272,225'Key recovery condition encryption and decryption apparatuses'2001 6,266,421'Key recovery system and key recovery method'2001 6,260,145'System and method of authentication of digital information'2001 6,185,308'Key recovery system'2001 5,935,248'Security level control apparatus and method for a network securing communications between parties without presetting the security level'1999 5,642,420'Cryptoinformation repeater, subscriber terminal connected thereto, and cryptocommunication method'1997

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1997–2005Patents assigned to FUJITSU LTD (14)· patent assignee history

1997–2005Based in Kawasaki, JP· patent location history

2001Patents assigned to HITACHI LTD (3)· patent assignee history

2001Patents assigned to NEC CORP (3)· patent assignee history

2001–2005Based in Kanagawa, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
FUJITSU LTD	14	1997–2005
HITACHI LTD	3	2001
NEC CORP	3	2001

Locations

Location	Patents	Span
Kawasaki, JP	11	1997–2005
Kanagawa, JP	3	2001–2005