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Inventor

Seiji Kumakura

Inventor
Tokyo, JP

Overview

3→
Patents
1977–1990
Patent span
Human necessities
Primary field (CPC A)

Patents· 3 as inventor

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

A61Pprimary
A61PSpecific therapeutic activity of chemical compounds or medicinal preparations50%
C07DHeterocyclic compounds50%
PatentTitleYear
4,914,093'Pyridazinone derivatives, their preparation and use'19904,716,162'Fused 5 ring heterocyclic compounds, their preparation, and their anti-arrhythmic and diuretic use'19874,007,189'Pyrrolotriazolopyrimidine derivatives and process for the preparation thereof'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977–1990Patents assigned to SANKYO CO (3)· patent assignee history
1977–1990Based in Tokyo, JP· patent location history
1987Based in Hiromachi, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
SANKYO CO31977–1990
Locations
LocationPatentsSpan
Tokyo, JP21977–1990
Hiromachi, JP11987