Inventor

Shinichirou Harasawa

Inventor

Kawasaki, JP

Overview

1995–2010

Patent span

Electricity

Primary field (CPC H)

Patents· 16 as inventor

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

H04Bprimary

H04BTransmission43%

H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light26%

H04JMultiplex communication22%

G02BOptical elements, systems or apparatus4%

H05BElectric heating4%

PatentTitleYear

7,792,430'Automatic power restoring method and optical communication system'2010 7,664,392'Automatic power restoring method and optical communication system'2010 7,437,069'Automatic power restoring method and optical communication system'2008 7,420,666'Measurement method by OTDR and terminal station apparatus'2008 7,215,415'Measurement method by OTDR and terminal station apparatus'2007 7,092,149'Input monitoring system for optical amplifying repeater'2006 6,721,507'Optical communications system'2004 6,414,770'Optical communications system'2002 6,233,076'Optical communications system'2001 6,144,474'Optical transmission system including optical repeaters with selectively enabled gain equalizers contained therein and including an add/drop apparatus with a plurality of individually selectable filters'2000 5,883,735'Optical amplifying repeater'1999 5,838,476'Input monitoring system for optical amplifying repeater'1998 5,784,192'Optical amplifying repeater'1998 5,615,290'Branch device for optical multiplex system'1997 5,530,936'Semiconductor laser driving circuit'1996 5,459,328'Driver circuit for light emitting elements connected in series and an optical amplifying repeater using the same'1995

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1995–2010Patents assigned to FUJITSU LTD (15)· patent assignee history

1995–2010Based in Kawasaki, JP· patent location history

2000Based in Hachioji, JP· patent location history

2007–2010Patents assigned to NIPPON TELEGRAPH & TELEPHONE (4)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
FUJITSU LTD	15	1995–2010
NIPPON TELEGRAPH & TELEPHONE	4	2007–2010

Locations

Location	Patents	Span
Kawasaki, JP	15	1995–2010
Hachioji, JP	1	2000