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TOTSUKA-KU, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Communication system using passive optical network and passive opti...
Patent number
8,160,448
Issue date
Apr 17, 2012
Hitachi, Ltd.
Munetoshi Tsuge
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Communication system using passive optical network and passive opti...
Patent number
8,160,447
Issue date
Apr 17, 2012
Hitachi, Ltd.
Munetoshi Tsuge
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Passive optical network system and optical line terminating apparatus
Patent number
8,027,586
Issue date
Sep 27, 2011
Hitachi, Ltd.
Hiroki Ikeda
H04 - ELECTRIC COMMUNICATION TECHNIQUE
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
ATM cell switching system
Patent number
6,728,242
Issue date
Apr 27, 2004
Hitachi, Ltd.
Yoshito Sakurai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Distributed type switching system
Patent number
6,639,920
Issue date
Oct 28, 2003
Hitachi, Ltd.
Yoshito Sakurai
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
ATM cell switching system
Patent number
6,546,011
Issue date
Apr 8, 2003
Hitachi, Ltd.
Yoshito Sakurai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
ATM cell switching system
Patent number
6,463,057
Issue date
Oct 8, 2002
Hitachi, Ltd.
Takahiko Kozaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
ATM cell switching system
Patent number
6,445,703
Issue date
Sep 3, 2002
Hitachi, Ltd.
Yoshito Sakurai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
ATM cell switching system
Patent number
6,396,831
Issue date
May 28, 2002
Hitachi, Ltd.
Takahiko Kozaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Distributed type switching system
Patent number
6,389,025
Issue date
May 14, 2002
Hitachi, Ltd.
Yoshito Sakurai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
ATM cell switching system
Patent number
6,339,596
Issue date
Jan 15, 2002
Hitachi, Ltd.
Takahiko Kozaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Distributed type switching system
Patent number
6,335,934
Issue date
Jan 1, 2002
Hitachi, Ltd.
Yoshito Sakurai
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
Distributed type switching system
Patent number
6,304,570
Issue date
Oct 16, 2001
Hitachi, Ltd.
Yoshito Sakurai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
ATM cell switching system
Patent number
6,285,675
Issue date
Sep 4, 2001
Hitachi, Ltd.
Yoshito Sakurai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
ATM cell switching system
Patent number
6,215,788
Issue date
Apr 10, 2001
Hitachi, Ltd.
Yoshito Sakurai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
ATM switching system connectable to I/O links having different tran...
Patent number
RE36751
Issue date
Jun 27, 2000
Hitachi, Ltd.
Takahiko Kozaki
370 - Multiplex communications
Information
Patent Grant
Switching system for switching cells having error detection apparatus
Patent number
RE36716
Issue date
May 30, 2000
Hitachi, Ltd.
Takahiko Kozaki
370 - Multiplex communications
Information
Patent Grant
ATM switch and control method thereof
Patent number
6,067,654
Issue date
May 23, 2000
Hitachi, Ltd.
Yukio Nakano
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
ATM cell switching system
Patent number
6,016,317
Issue date
Jan 18, 2000
Hitachi, Ltd.
Yoshito Sakurai
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
Distributed type switching system
Patent number
5,995,510
Issue date
Nov 30, 1999
Hitachi, Ltd.
Yoshito Sakurai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
ATM switch and control method thereof
Patent number
5,983,386
Issue date
Nov 9, 1999
Hitachi, Ltd.
Yukio Nakano
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
ATM switch and control method thereof
Patent number
5,818,853
Issue date
Oct 6, 1998
Hitachi, Ltd.
Yukio Nakano
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
ATM cell switching system
Patent number
5,799,014
Issue date
Aug 25, 1998
Hitachi, Ltd.
Takahiko Kozaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Apparatus for monitoring and controlling autonomous switching of tr...
Patent number
5,745,495
Issue date
Apr 28, 1998
Hitachi, Ltd.
Yoshito Sakurai
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
Patents Applications
last 30 patents
Information
Patent Application
Communication System Using Passive Optical Network and Passive Opti...
Publication number
20090232498
Publication date
Sep 17, 2009
Munetoshi Tsuge
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Communication System Using Passive Optical Network and Passive Opti...
Publication number
20090103918
Publication date
Apr 23, 2009
Munetoshi Tsuge
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Passive optical network system and optical line terminating apparatus
Publication number
20090097861
Publication date
Apr 16, 2009
Hitachi Communication Technologies, Ltd.
Hiroki Ikeda
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
ATM cell switching system
Publication number
20030123440
Publication date
Jul 3, 2003
Yoshito Sakurai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
DISTRIBUTED TYPE SWITCHING SYSTEM
Publication number
20020126649
Publication date
Sep 12, 2002
Yoshito Sakurai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Packet switching system having self-routing switches
Publication number
20020057696
Publication date
May 16, 2002
Shirou Tanabe
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
ATM CELL SWITCHING SYSTEM
Publication number
20010043597
Publication date
Nov 22, 2001
TAKAHIKO KOZAKI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Distributed type switching system
Publication number
20010028658
Publication date
Oct 11, 2001
Yoshito Sakurai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
ATM cell switching system
Publication number
20010028652
Publication date
Oct 11, 2001
Yoshito Sakurai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
ATM cell switching system
Publication number
20010005386
Publication date
Jun 28, 2001
Yoshito Sakurai
H04 - ELECTRIC COMMUNICATION TECHNIQUE