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Inventor

Hirotoshi Nagata

Inventor
Funabashi, JP

Overview

14→
Patents
1994–2007
Patent span
Physics
Primary field (CPC G)

Patents· 14 as inventor

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

G02Fprimary
G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein69%
G02BOptical elements, systems or apparatus25%
Y10TTechnical subjects covered by former us classification6%
PatentTitleYear
7,231,101'Electro-optic waveguide device capable of suppressing bias point DC drift and thermal bias point shift'20077,171,063'Controllable electro-optic device having substrate trenches between electrodes'20076,980,705'Optical waveguide device'20056,956,980'Optical waveguide type optical modulator and production method therefor'20056,806,113'Optical waveguide device and method for forming optical waveguide device'20046,583,480'Electro-optical element having protective film on top and side surfaces of buffer layer'20036,539,153'Light limiter'20036,233,385'Light limiter'20016,218,658'Optical fuse'20016,134,372'Light intensity attenuator and attenuating method'20005,727,105'Package structure for optical element and fibers and composite structure thereof'19985,613,026'Package structure for optical element and fibers and composite structure thereof'19975,526,448'Optical waveguide modulator having a reduced D.C. drift'19965,359,690'Cutting method and apparatus for removing a secondary coating layer from a jacketed optical fiber'1994

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1994Patents assigned to SUMITOMO CEMENT CO (1)· patent assignee history
1994–2005Based in Funabashi, JP· patent location history
1996Patents assigned to SUMITOMO CEMENT COMPANY LTD (1)· patent assignee history
1997–2005Patents assigned to SUMITOMO OSAKA CEMENT CO LTD (8)· patent assignee history
2000–2003Patents assigned to NEC CORP (4)· patent assignee history
2001–2005Based in Tokyo, JP· patent location history
2004Based in Chiba, JP· patent location history
2007Patents assigned to JDS UNIPHASE CORP (2)· patent assignee history
2007Based in Avon, CT, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
SUMITOMO OSAKA CEMENT CO LTD81997–2005
NEC CORP42000–2003
JDS UNIPHASE CORP22007
SUMITOMO CEMENT CO11994
SUMITOMO CEMENT COMPANY LTD11996
Locations
LocationPatentsSpan
Funabashi, JP91994–2005
Avon, CT, US22007
Tokyo, JP22001–2005
Chiba, JP12004