Inventor

Yoshikiyo Futagawa

Inventor

Shiojiri, JP

Overview

7→

Patents

1976–1997

Patent span

Physics

Primary field (CPC G)

Patents· 7 as inventor

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

B41Jprimary

B41JTypewriters33%

G09GArrangements or circuits for control of indicating devices using static means to present variable information22%

H03MCoding22%

G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein11%

G05FSystems for regulating electric or magnetic variables11%

PatentTitleYear

5,631,675'Method and apparatus for driving an ink jet recording head'1997 5,347,300'Ink-jet printer driver'1994 4,617,563'Liquid crystal display device'1986 4,168,498'Digital display drive and voltage divider circuit'1979 4,087,861'Calculator'1978 4,075,623'Reference voltage circuit'1978 3,991,671'Dynamically driven printer'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1979Patents assigned to SUWA SEIKOSHA KK (3)· patent assignee history

1976Based in Okaya, JP· patent location history

1978Patents assigned to EPSON CORP (1)· patent assignee history

1978–1986Based in Shiojiri, JP· patent location history

1986–1997Patents assigned to SEIKO EPSON CORP (3)· patent assignee history

1994–1997Based in Nagano, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
SEIKO EPSON CORP	3	1986–1997
SUWA SEIKOSHA KK	3	1976–1979
EPSON CORP	1	1978

Locations

Location	Patents	Span
Shiojiri, JP	4	1978–1986
Nagano, JP	2	1994–1997
Okaya, JP	1	1976