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Inventor

Setsuko Yamamoto

Inventor
Toyonaka, JP

Overview

4→
Patents
1996–2001
Patent span
Chemistry
Primary field (CPC C)

Patents· 4 as inventor

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

C09Bprimary
C09BOrganic dyes or closely-related compounds for producing dyes, e.g. pigments38%
G02BOptical elements, systems or apparatus38%
B32BLayered products, i.e. products built-up of strata of flat or non-flat, e.g. cellular or honeycomb, form13%
C07DHeterocyclic compounds13%
PatentTitleYear
6,235,064'Dye containing polarizing film'20015,700,296'Azo compound and a polarizing film containing the same'19975,609,796'Dye containing polarizing film'19975,496,949'Pyrazine derivatives'1996

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1996Patents assigned to KOEI CHEMICAL CO (1)· patent assignee history
1996Based in Tokyo, JP· patent location history
1997–2001Patents assigned to SUMITOMO CHEMICAL CO (3)· patent assignee history
1997–2001Based in Toyonaka, JP· patent location history
1997Based in Osaka, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
SUMITOMO CHEMICAL CO31997–2001
KOEI CHEMICAL CO11996
Locations
LocationPatentsSpan
Toyonaka, JP21997–2001
Osaka, JP11997
Tokyo, JP11996