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Masahisa Kawashima
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Tokyo, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Certificate authenticating method, certificate issuing device, and...
Patent number
8,775,796
Issue date
Jul 8, 2014
Nippon Telegraph and Telephone Corporation
Kei Karasawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Email system restoring recipient identifier based on identifier-for...
Patent number
7,580,980
Issue date
Aug 25, 2009
Nippon Telegraph and Telephone Corporation
Masahisa Kawashima
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Mail distribution system, mail distribution method, and mail distri...
Patent number
7,558,827
Issue date
Jul 7, 2009
Nippon Telegraph and Telephone Corporation
Masahisa Kawashima
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
File transfer system, apparatus, method and computer readable mediu...
Patent number
7,386,574
Issue date
Jun 10, 2008
Nippon Telegraph and Telephone Corporation
Tsuyoshi Abe
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
OPTICAL COMMUNICATION APPARATUS, OPTICAL COMMUNICATION SYSTEM AND T...
Publication number
20240413907
Publication date
Dec 12, 2024
Nippon Telegraph and Telephone Corporation
Naotaka SHIBATA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
DATA PROCESSING SYSTEM, DATA PROVIDING SYSTEM, EVENT INFORMATION GE...
Publication number
20240205299
Publication date
Jun 20, 2024
Nippon Telegraph and Telephone Corporation
Shintaro MIZUNO
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
INFORMATION COMMUNICATION APPARATUS, INFORMATION COMMUNICATION METH...
Publication number
20240195873
Publication date
Jun 13, 2024
Nippon Telegraph and Telephone Corporation
Shintaro MIZUNO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
PROCESSING SYSTEM, AND PROCESSING METHOD
Publication number
20230224360
Publication date
Jul 13, 2023
Nippon Telegraph and Telephone Corporation
Masahisa KAWASHIMA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
CERTIFICATE AUTHENTICATING METHOD, CERTIFICATE ISSUING DEVICE, AND...
Publication number
20110185171
Publication date
Jul 28, 2011
Nippon Telegraph and Telephone Corp.
Kei Karasawa
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
Mail distribution system, mail distribution method, and mail distri...
Publication number
20070011245
Publication date
Jan 11, 2007
NIPPON TELEGRAPH AND TELEPHONE CORP.
Masahisa Kawashima
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Communication method, communication system, relay system, communica...
Publication number
20060129629
Publication date
Jun 15, 2006
Nippon Telegraph and Telephone Corporation
Masahisa Kawashima
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
File transfer system, apparatus, method and computer readable mediu...
Publication number
20030187852
Publication date
Oct 2, 2003
Tsuyoshi Abe
H04 - ELECTRIC COMMUNICATION TECHNIQUE