Inventor

Hitoshi Kawaguchi

Inventor

Fukuoka, JP

Overview

3→

Patents

1990–2021

Patent span

Chemistry

Primary field (CPC C)

Patents· 3 as inventor

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

C07Bprimary

C07BGeneral methods of organic chemistry11%

C07CAcyclic or carbocyclic compounds11%

C07DHeterocyclic compounds11%

C07FAcyclic, carbocyclic or heterocyclic compounds containing elements other than carbon, hydrogen, halogen, oxygen, nitrogen, sulfur, selenium or tellurium11%

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

H01LSemiconductor devices11%

H05KPrinted circuits11%

H10DInorganic electric semiconductor devices11%

Y02PClimate change mitigation technologies in the production or processing of goods11%

PatentTitleYear

10,921,657Display device and wiring substrate2021 5,312,958'Process for producing 4-bromomethylbiphenyl compounds'1994 4,968,823'Process for the fractional production of alkytin oxide'1990

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1990Patents assigned to M & T YOSHITOMI CHEMICALS LTD (1)· patent assignee history

1990Patents assigned to YOSHITOMI PHARMACEUTICAL (1)· patent assignee history

1990–1994Based in Fukuoka, JP· patent location history

1994Patents assigned to TAKEDA CHEMICAL INDUSTRIES LTD (1)· patent assignee history

2021Patents assigned to JAPAN DISPLAY INC (1)· patent assignee history

2021Based in Minato-ku, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
JAPAN DISPLAY INC	1	2021
M & T YOSHITOMI CHEMICALS LTD	1	1990
TAKEDA CHEMICAL INDUSTRIES LTD	1	1994
YOSHITOMI PHARMACEUTICAL	1	1990

Locations

Location	Patents	Span
Fukuoka, JP	2	1990–1994
Minato-ku, JP	1	2021