Membership
Tour
Register
Log in
Sadao Mizokawa
Follow
Person
Hitachi, JP
People
Overview
Industries
Organizations
People
Information
Impact
Patents Grants
last 30 patents
Information
Patent Grant
Method of locating fault of communication system
Patent number
5,706,422
Issue date
Jan 6, 1998
Hitachi Ltd.
Hisayuki Maruyama
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Data transmission method and system thereof
Patent number
5,497,374
Issue date
Mar 5, 1996
Hitachi, Ltd.
Hisayuki Maruyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Transmission method and system thereof
Patent number
5,426,638
Issue date
Jun 20, 1995
Hitachi, Ltd.
Hisayuki Maruyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Transmission system constituted of multistage reproduction nodes
Patent number
5,414,739
Issue date
May 9, 1995
Hitachi, Ltd.
Naoya Kobayashi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Bridge apparatus with an address check circuit for interconnecting...
Patent number
5,247,620
Issue date
Sep 21, 1993
Hitachi, Ltd.
Junji Fukuzawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Signal transmission system having a star coupled repeater
Patent number
5,210,632
Issue date
May 11, 1993
Hitachi, Ltd.
Toshiyuki Murakami
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Method of detecting recovery from fault in a data transmission syst...
Patent number
4,704,714
Issue date
Nov 3, 1987
Hitachi, Ltd.
Hiroshi Tomizawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Loop type data transmission system
Patent number
4,604,742
Issue date
Aug 5, 1986
Hitachi, Ltd.
Takuji Hamada
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Reconfiguration control method for a loop-type data network
Patent number
4,530,085
Issue date
Jul 16, 1985
Hitachi, Ltd.
Takuji Hamada
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Loop type data highway system
Patent number
4,510,494
Issue date
Apr 9, 1985
Hitachi, Ltd.
Sadao Mizokawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Rotary type optical switch
Patent number
4,401,365
Issue date
Aug 30, 1983
Hitachi, Ltd.
Sadao Mizokawa
G02 - OPTICS
Information
Patent Grant
Loop type data highway system for data transmission
Patent number
4,398,288
Issue date
Aug 9, 1983
Hitachi, Ltd.
Sadao Mizokawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Interrupt control system
Patent number
4,349,872
Issue date
Sep 14, 1982
Hitachi, Ltd.
Sigeru Fukasawa
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Data communication system
Patent number
4,170,715
Issue date
Oct 9, 1979
Hitachi, Ltd.
Sadao Mizokawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE