Inventor

Shohei Yamaguchi

Inventor

Tokyo, JP

Overview

17→

Patents

1999–2020

Patent span

Electricity

Primary field (CPC H)

Patents· 17 as inventor

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

H04Bprimary

H04BTransmission23%

G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein10%

H04JMultiplex communication10%

G02BOptical elements, systems or apparatus5%

H01RElectrically-conductive connections5%

H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light5%

B32BLayered products, i.e. products built-up of strata of flat or non-flat, e.g. cellular or honeycomb, form3%

C08FMacromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds3%

C08GMacromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds3%

C08JWorking-up3%

PatentTitleYear

10,815,349Resin composition, prepreg, resin sheet, metal foil-clad laminate, and printed circuit board2020 10,673,155Electrical connector for flat conductor2020 10,666,044Grounding circuit, electrical device, grounding control method, and grounding control program2020 10,355,744Feed line branching apparatus and feed line branching method2019 10,288,826Node apparatus and node apparatus control method2019 10,128,589Electrical connector for flat conductor2018 7,151,630'Raman amplification repeater'2006 6,956,693'Optical repeater having independently controllable amplification factors'2005 6,847,743'Polarization scrambler unit and multi-repeater transmission system incorporating the same'2005 6,628,870'Block gain equalizer'2003 6,549,314'Optical control apparatus, optical junction apparatus, optical ADM apparatus and optical transmission apparatus having thereof'2003 6,323,983'Optical switch'2001 6,169,625'Saturable absorption type optical switch and controlling method therefor'2001 6,163,084'Cable branching unit'2000 6,078,413'Optical branching/multiplexing apparatus'2000 6,038,046'Branching system with optical add drop multiplexing function'2000 5,861,975'Wavelength stability circuit'1999

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1999–2020Patents assigned to NEC CORP (14)· patent assignee history

1999–2020Based in Tokyo, JP· patent location history

2001Based in Toyko, JP· patent location history

2018–2020Patents assigned to HIROSE ELECTRIC CO LTD (2)· patent assignee history

2020Patents assigned to MITSUBISHI GAS CHEMICAL CO (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
NEC CORP	14	1999–2020
HIROSE ELECTRIC CO LTD	2	2018–2020
MITSUBISHI GAS CHEMICAL CO	1	2020

Locations

Location	Patents	Span
Tokyo, JP	16	1999–2020
Toyko, JP	1	2001