Inventor

Toyokazu Okada

Inventor

Osaka, JP

Overview

11→

Patents

1989–2009

Patent span

Physics

Primary field (CPC G)

Patents· 11 as inventor

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

G02Bprimary

G02BOptical elements, systems or apparatus21%

Y10TTechnical subjects covered by former us classification18%

G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein12%

C08JWorking-up9%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests9%

C08GMacromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds6%

H01BCables6%

B29CShaping or joining of plastics3%

B29DProducing particular articles from plastics or from substances in a plastic state3%

B60YIndexing scheme relating to aspects cross-cutting vehicle technology3%

PatentTitleYear

7,586,680'Projection screen having a plural number of light control layers'2009 5,310,509'Dye-containing light-polarizing film'1994 5,285,303'Phase retarder and process for producing the same'1994 5,244,713'Optical film'1993 5,082,601'Light-polarizing films'1992 5,061,042'Phase retarder and liquid crystal display using the same'1991 4,953,952'Color liquid crystal displaying panels'1990 4,895,677'Light-polarizing film'1990 4,859,039'Light-polarizing film'1989 4,803,014'Light-polarizing film'1989 4,802,745'Light-polarizing films'1989

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1989–2009Patents assigned to SUMITOMO CHEMICAL CO (11)· patent assignee history

1989–1994Based in Osaka, JP· patent location history

1994Based in Suita, JP· patent location history

2009Based in Yokohama, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
SUMITOMO CHEMICAL CO	11	1989–2009

Locations

Location	Patents	Span
Osaka, JP	9	1989–1994
Yokohama, JP	1	2009
Suita, JP	1	1994