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Inventor

Ken Kumata

Inventor
Ibaraki, JP

Overview

2→
Patents
1980–1984
Patent span
Chemistry
Primary field (CPC C)

Patents· 2 as inventor

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

C03Cprimary
C03CChemical composition of glasses, glazes or vitreous enamels50%
G02BOptical elements, systems or apparatus25%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests25%
PatentTitleYear
4,453,803'Optical waveguide for middle infrared band'19844,194,916'Reversibly photosensitive glass'1980

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1980–1984Patents assigned to AGENCY IND SCIENCE TECHN (2)· patent assignee history
1980Patents assigned to JAPAN INT TRADE IND (1)· patent assignee history
1980Based in Musashimurayama, JP· patent location history
1984Patents assigned to MITI MINI INT TRADE & IND (1)· patent assignee history
1984Based in Ibaraki, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
AGENCY IND SCIENCE TECHN21980–1984
JAPAN INT TRADE IND11980
MITI MINI INT TRADE & IND11984
Locations
LocationPatentsSpan
Ibaraki, JP11984
Musashimurayama, JP11980