Inventor

Keiji Kamiyama

Inventor
Ibaraki, JP

Overview

19→
Patents
1999–2014
Patent span
Chemistry
Primary field (CPC C)

Patents· 19 as inventor

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

C07Dprimary
C07DHeterocyclic compounds29%
A61KPreparations for medical, dental or toiletry purposes25%
A61PSpecific therapeutic activity of chemical compounds or medicinal preparations23%
C07BGeneral methods of organic chemistry14%
C12PFermentation or enzyme-using processes to synthesise a desired chemical compound or composition or to separate optical isomers from a racemic mixture3%
C07CAcyclic or carbocyclic compounds2%
C07KPeptides2%
C12NMicroorganisms or enzymes2%
C12RIndexing scheme associated with subclasses c12c - c12q, relating to microorganisms2%

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1999–2003Patents assigned to TAKEDA CHEMICAL INDUSTRIES LTD (8)· patent assignee history
1999–2013Based in Osaka, JP· patent location history
2001–2014Based in Ibaraki, JP· patent location history
2005–2014Patents assigned to TAKEDA PHARMACEUTICAL (11)· patent assignee history
2013Patents assigned to AOKI ISAO (1)· patent assignee history
2013Patents assigned to FUJISHIMA AKIRA (1)· patent assignee history
2013Patents assigned to KAMIYAMA KEIJI (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
TAKEDA PHARMACEUTICAL112005–2014
TAKEDA CHEMICAL INDUSTRIES LTD81999–2003
AOKI ISAO12013
FUJISHIMA AKIRA12013
KAMIYAMA KEIJIself12013
Locations
LocationPatentsSpan
Ibaraki, JP132001–2014
Osaka, JP61999–2013