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Shirou Tanabe
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Hachioji, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Packet switching system having self-routing switches
Patent number
7,058,062
Issue date
Jun 6, 2006
Hitachi, Ltd.
Shirou Tanabe
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Packet switching system having-having self-routing switches
Patent number
6,618,372
Issue date
Sep 9, 2003
Hitachi, Ltd.
Shirou Tanabe
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Packet switching system having self-routing switches
Patent number
6,314,096
Issue date
Nov 6, 2001
Hitachi, Ltd.
Shirou Tanabe
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Time-division channel arrangement
Patent number
6,005,867
Issue date
Dec 21, 1999
Hitachi, Ltd.
Shirou Tanabe
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Packet switching system having self-routing switches
Patent number
5,999,537
Issue date
Dec 7, 1999
Hitachi, Ltd.
Shirou Tanabe
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Packet switching system having self-routing switches
Patent number
5,740,156
Issue date
Apr 14, 1998
Hitachi, Ltd.
Shirou Tanabe
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Method and apparatus of multiplexing digital signal
Patent number
5,703,869
Issue date
Dec 30, 1997
Hitachi Ltd.
Akihiko Takase
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Method and apparatus for multiplexing digital signal
Patent number
5,461,626
Issue date
Oct 24, 1995
Hitachi, Ltd.
Akihiko Takase
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
High-speed packet switching system
Patent number
5,214,640
Issue date
May 25, 1993
Hitachi, Ltd.
Yoshito Sakurai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Packet concentrator and packet switching system
Patent number
5,164,937
Issue date
Nov 17, 1992
Hitachi, Ltd.
Shirou Tanabe
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Communication system including portable terminals and fixed terminals
Patent number
5,157,660
Issue date
Oct 20, 1992
Hitachi, Ltd.
Hiroshi Kuwahara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Packet switch communication network using packet having virtual cha...
Patent number
5,119,369
Issue date
Jun 2, 1992
Hitachi, Ltd.
Shirou Tanabe
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Method and system for data driven information processing
Patent number
4,901,274
Issue date
Feb 13, 1990
Hitachi, Ltd.
Yukihito Maejima
G06 - COMPUTING CALCULATING COUNTING
Patents Applications
last 30 patents
Information
Patent Application
Packet switching system having self-routing switches
Publication number
20020057696
Publication date
May 16, 2002
Shirou Tanabe
H04 - ELECTRIC COMMUNICATION TECHNIQUE