Inventor

Katsumi Aota

Inventor

Tokorozawa, JP

Overview

5→

Patents

1986–2006

Patent span

Physics

Primary field (CPC G)

Patents· 5 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 therein42%

G03CPhotosensitive materials for photographic purposes8%

G03FPhotomechanical production of textured or patterned surfaces, e.g. for printing, for processing of semiconductor devices8%

G04CElectromechanical clocks or watches8%

G04GElectronic time-pieces8%

G06FElectric digital data processing8%

G09GArrangements or circuits for control of indicating devices using static means to present variable information8%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests8%

PatentTitleYear

7,136,138'Liquid crystal display device'2006 4,748,445'Matrix display panel having a diode ring structure as a resistive element'1988 4,673,253'Method of making a liquid crystal display with color filters'1987 4,655,552'Flat panel display device having on-screen data input function'1987 4,610,509'Liquid crystal color display panels'1986

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1986–2006Patents assigned to CITIZEN WATCH CO LTD (5)· patent assignee history

1986–1987Based in Tokyo, JP· patent location history

1987–2006Based in Tokorozawa, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
CITIZEN WATCH CO LTD	5	1986–2006

Locations

Location	Patents	Span
Tokorozawa, JP	3	1987–2006
Tokyo, JP	2	1986–1987