Fumihiro Ikawa

Person

Yokohama, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Terminal apparatus, device for detecting the mismatching of work/pr...
- Patent number 6,614,753
- Issue date Sep 2, 2003
- Fujitsu Limited
- Fumihiro Ikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical transmission system wherein protection terminal equipment c...
- Patent number 6,147,783
- Issue date Nov 14, 2000
- Fujitsu Limited
- Fumihiro Ikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and apparatus for nested automatic protection switching
- Patent number 6,141,320
- Issue date Oct 31, 2000
- Fujitsu Limited
- Fumihiro Ikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical transmission system and transmission line switching control...
- Patent number 5,978,354
- Issue date Nov 2, 1999
- Fujitsu Limited
- Hisashi Taketomi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Line switching control system in synchronous communication network...
- Patent number 5,757,769
- Issue date May 26, 1998
- Fujitsu Limited
- Fumihiro Ikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical communication system having an improved protection line swi...
- Patent number 5,091,796
- Issue date Feb 25, 1992
- Fujitsu Limited
- Koichi Nishimura
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
One-to-one switching system
- Patent number 5,073,774
- Issue date Dec 17, 1991
- Fujitsu Limited
- Fumihiro Ikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Fumihiro Ikawa

Person

Patents Grantslast 30 patents

Terminal apparatus, device for detecting the mismatching of work/pr...

Optical transmission system wherein protection terminal equipment c...

Method and apparatus for nested automatic protection switching

Optical transmission system and transmission line switching control...

Line switching control system in synchronous communication network...

Optical communication system having an improved protection line swi...

One-to-one switching system