Inventor

Eiichi Nakagawa

Inventor

Tokyo, JP

Overview

9→

Patents

1991–2017

Patent span

Electricity

Primary field (CPC H)

Patents· 9 as inventor

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

H01Sprimary

H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light33%

H04BTransmission33%

A41DOuterwear8%

G02BOptical elements, systems or apparatus8%

G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein8%

H04QSelecting8%

PatentTitleYear

9,622,526'Glove, and method for producing the same'2017 6,934,434'Circuit for switching optical paths'2005 6,792,192'Optical variable attenuator'2004 6,714,394'Electric power feeding line switching method, electric power feeding line switching apparatus and electric power feeding line switching system'2004 6,563,236'Feed line switching circuit and branching unit'2003 5,510,930'Light amplifying apparatus'1996 5,455,704'Optical-fiber light amplifier'1995 5,367,587'Optical amplifier'1994 4,989,930'Optoelectronics package'1991

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1991–2005Patents assigned to MITSUBISHI ELECTRIC CORP (8)· patent assignee history

1991Based in Kanagawa, JP· patent location history

1994–1996Based in Kamakura, JP· patent location history

1996Patents assigned to KOKUSAI DENSHIN DENWA CO LTD (1)· patent assignee history

2003Patents assigned to KDDI SUBMARINE CABLE SYS INC (1)· patent assignee history

2003–2005Based in Tokyo, JP· patent location history

2017Patents assigned to SHOWA GLOVE CO (1)· patent assignee history

2017Based in Hyogo, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
MITSUBISHI ELECTRIC CORP	8	1991–2005
KDDI SUBMARINE CABLE SYS INC	1	2003
KOKUSAI DENSHIN DENWA CO LTD	1	1996
SHOWA GLOVE CO	1	2017

Locations

Location	Patents	Span
Tokyo, JP	4	2003–2005
Kamakura, JP	3	1994–1996
Hyogo, JP	1	2017
Kanagawa, JP	1	1991