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Akira Horiki
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Yokohama, JP
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Patents Grants
last 30 patents
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
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
6,445,703
Issue date
Sep 3, 2002
Hitachi, Ltd.
Yoshito Sakurai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
ATM cell switching system
Patent number
6,285,675
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 cell switching system
Patent number
6,016,317
Issue date
Jan 18, 2000
Hitachi, Ltd.
Yoshito Sakurai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Switching system and method of construction thereof
Patent number
RE34305
Issue date
Jul 6, 1993
Hitachi, Ltd.
Yoshito Sakurai
370 - Multiplex communications
Information
Patent Grant
Method of direct memory access control
Patent number
5,067,075
Issue date
Nov 19, 1991
Hitachi, Ltd.
Minoru Sugano
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Switching system and method of construction thereof
Patent number
4,910,731
Issue date
Mar 20, 1990
Hitachi, Ltd.
Yoshito Sakurai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Packet switching equipment and a packet switching method for contro...
Patent number
4,876,681
Issue date
Oct 24, 1989
Hitachi, Ltd.
Masayoshi Hagiwara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Composite concentration system
Patent number
4,571,721
Issue date
Feb 18, 1986
Nippon Telegraph and Telephone Public Corporation
Tadahiko Yasui
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Voice signal converting device
Patent number
4,403,322
Issue date
Sep 6, 1983
Hitachi, Ltd.
Takao Kato
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Signal monitoring and controlling system in a time division switchi...
Patent number
4,327,436
Issue date
Apr 27, 1982
Hitachi, Ltd.
Susumu Ohara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Immediate ring-back control system for time-division telephone exch...
Patent number
4,170,718
Issue date
Oct 9, 1979
Katsuyuki Miyazaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Immediate ring-back control system for time-division telephone exch...
Patent number
4,152,548
Issue date
May 1, 1979
Hitachi, Ltd.
Akira Horiki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Analog-digital code converter in a digital telephone switching system
Patent number
4,143,242
Issue date
Mar 6, 1979
Hitachi, Ltd.
Akira Horiki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
ATM cell switching system
Publication number
20030123440
Publication date
Jul 3, 2003
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