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Tsutomu Matsumoto
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Yokohama-shi, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Connector system, connector, and connection method
Patent number
11,189,974
Issue date
Nov 30, 2021
Sumitomo Electric Industries, Ltd.
Yoshikazu Isoyama
B60 - VEHICLES IN GENERAL
Information
Patent Grant
System and method for detecting attack when sensor and traffic info...
Patent number
10,397,244
Issue date
Aug 27, 2019
Toyota Jidosha Kabushiki Kaisha
Tsuyoshi Toyama
B60 - VEHICLES IN GENERAL
Information
Patent Grant
Communication system, communication method, and communication device
Patent number
10,270,768
Issue date
Apr 23, 2019
Fujitsu Limited
Jun Yajima
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Message authentication method in communication system and communica...
Patent number
9,331,854
Issue date
May 3, 2016
Toyota Jidosha Kabushiki Kaisha
Hisashi Oguma
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Digital signing method
Patent number
7,770,009
Issue date
Aug 3, 2010
Hitachi, Ltd.
Kunihiko Miyazaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Electronic document authenticity assurance method and electronic do...
Patent number
7,526,645
Issue date
Apr 28, 2009
Hitachi, Ltd.
Kunihiko Miyazaki
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Data distribution system
Patent number
7,308,583
Issue date
Dec 11, 2007
Matsushita Electric Industrial Co., Ltd.
Natsume Matsuzaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Digital signing method
Patent number
7,305,558
Issue date
Dec 4, 2007
Hitachi, Ltd.
Kunihiko Miyazaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Time stamping system for electronic documents and program medium fo...
Patent number
7,266,698
Issue date
Sep 4, 2007
Amano Corporation
Tsutomu Matsumoto
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Time stamp generating system
Patent number
7,200,682
Issue date
Apr 3, 2007
Hitachi, Ltd.
Kunihiko Miyazaki
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Optical disc having land pre-pits and variable groove depths
Patent number
6,819,650
Issue date
Nov 16, 2004
Victor Company of Japan, Ltd.
Takayuki Deno
G11 - INFORMATION STORAGE
Information
Patent Grant
Digital signature generating method and digital signature verifying...
Patent number
6,816,969
Issue date
Nov 9, 2004
Hitachi, Ltd.
Kunihiko Miyazaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Data converter and recording medium on which program for executing...
Patent number
6,769,063
Issue date
Jul 27, 2004
Nippon Telegraph and Telephone Corporation
Masayuki Kanda
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
DEVICE AND METHOD
Publication number
20240070097
Publication date
Feb 29, 2024
Toyota Jidosha Kabushiki Kaisha
Yosuke MAEKAWA
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
CONNECTOR SYSTEM, CONNECTOR, AND CONNECTION METHOD
Publication number
20210151941
Publication date
May 20, 2021
Sumitomo Electric Industries, Ltd.
Yoshikazu ISOYAMA
B60 - VEHICLES IN GENERAL
Information
Patent Application
SYSTEM AND METHOD FOR DETECTING ATTACK WHEN SENSOR AND TRAFFIC INFO...
Publication number
20190334924
Publication date
Oct 31, 2019
Toyota Jidosha Kabushiki Kaisha
Tsuyoshi TOYAMA
B60 - VEHICLES IN GENERAL
Information
Patent Application
COMMUNICATION SYSTEM, COMMUNICATION METHOD, AND COMMUNICATION DEVICE
Publication number
20170208065
Publication date
Jul 20, 2017
Fujitsu Limited
Jun Yajima
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
SYSTEM AND METHOD FOR DETECTING ATTACK
Publication number
20170032671
Publication date
Feb 2, 2017
Toyota Jidosha Kabushiki Kaisha
Tsuyoshi TOYAMA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
CRYPTOGRAPHIC COMMUNICATION SYSTEM, COMMUNICATION DEVICE, KEY DISTR...
Publication number
20150033019
Publication date
Jan 29, 2015
Hisashi Oguma
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
MESSAGE AUTHENTICATION METHOD IN COMMUNICATION SYSTEM AND COMMUNICA...
Publication number
20140310530
Publication date
Oct 16, 2014
Hisashi Oguma
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
ELECTRONIC DOCUMENT AUTHENTICITY ASSURANCE METHOD AND ELECTRONIC DO...
Publication number
20090193259
Publication date
Jul 30, 2009
Hitachi, Ltd
Kunihiko Miyazaki
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
Digital signing method
Publication number
20080098232
Publication date
Apr 24, 2008
Hitachi, Ltd
Kunihiko Miyazaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Electronic document authenticity assurance method and electronic do...
Publication number
20050015600
Publication date
Jan 20, 2005
Kunihiko Miyazaki
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
Time stamp generating system
Publication number
20030212828
Publication date
Nov 13, 2003
Kunihiko Miyazaki
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
Data distribution system
Publication number
20030161474
Publication date
Aug 28, 2003
Natsume Matsuzaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Time stamping system for electronic documents and program medium fo...
Publication number
20030159048
Publication date
Aug 21, 2003
Tsutomu Matsumoto
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
Digital signature generating method and digital signature verifying...
Publication number
20020108044
Publication date
Aug 8, 2002
Kunihiko Miyazaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical disc substrate and manufacturing method of optical disc mas...
Publication number
20020093906
Publication date
Jul 18, 2002
Takayuki Deno
G11 - INFORMATION STORAGE