Inventor

Fumihiro Ikawa

Inventor

Kawasaki, JP

Overview

1991–2003

Patent span

Electricity

Primary field (CPC H)

Patents· 7 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

H04Jprimary

H04JMultiplex communication45%

H04BTransmission36%

H04LTransmission of digital information, e.g. telegraphic communication9%

H04QSelecting9%

PatentTitleYear

6,614,753'Terminal apparatus, device for detecting the mismatching of work/protection line bridging function in a synchronous communication network and the method'2003 6,147,783'Optical transmission system wherein protection terminal equipment converts alarm indication signal before relaying same to working terminal equipment'2000 6,141,320'Method and apparatus for nested automatic protection switching'2000 5,978,354'Optical transmission system and transmission line switching control method'1999 5,757,769'Line switching control system in synchronous communication network system'1998 5,091,796'Optical communication system having an improved protection line switching mechanism'1992 5,073,774'One-to-one switching system'1991

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1991–2003Patents assigned to FUJITSU LTD (7)· patent assignee history

1991–1992Based in Yokohama, JP· patent location history

1998–2000Based in Kawasaki, JP· patent location history

2003Based in Kanagawa, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
FUJITSU LTD	7	1991–2003

Locations

Location	Patents	Span
Kawasaki, JP	4	1998–2000
Yokohama, JP	2	1991–1992
Kanagawa, JP	1	2003