Inventor

Toshihiko Tojo

Inventor

Mobara, JP

Overview

2→

Patents

1978–1988

Patent span

Electricity

Primary field (CPC H)

Patents· 2 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 therein33%

H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems33%

H03BGeneration of oscillations, directly or by frequency-changing, by circuits employing active elements which operate in a non-switching manner33%

PatentTitleYear

4,759,612'Twisted nematic type liquid crystal display device having a color polarizer to provide an achromatic or colorless background'1988 4,096,559'Power supply circuit'1978

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1978–1988Patents assigned to HITACHI LTD (2)· patent assignee history

1978–1988Based in Mobara, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HITACHI LTD	2	1978–1988

Locations

Location	Patents	Span
Mobara, JP	2	1978–1988