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Inventor

Keizo Yamashita

Inventor
Kawasaki, JP

Overview

8→
Patents
1977–2001
Patent span
Chemistry
Primary field (CPC C)

Patents· 8 as inventor

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

C07Dprimary
C07DHeterocyclic compounds42%
H05KPrinted circuits25%
B21BRolling of metal8%
B32BLayered products, i.e. products built-up of strata of flat or non-flat, e.g. cellular or honeycomb, form8%
C25DProcesses for the electrolytic or electrophoretic production of coatings8%
Y10TTechnical subjects covered by former us classification8%
PatentTitleYear
6,252,075'Process for producing purine derivatives'20016,245,910'Process for producing purine derivatives'20016,087,497'Process for producing purine derivatives'20005,942,617'Process for producing purine derivatives'19995,831,092'Process for producing purine derivatives'19985,049,221'Process for producing a copper-clad laminate'19914,790,902'Method of producing conductor circuit boards'19884,053,370'Process for the fabrication of printed circuits'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977Patents assigned to KOITO MFG CO LTD (1)· patent assignee history
1977–1991Based in Shizuoka, JP· patent location history
1988–1991Patents assigned to MEIKO ELECTRONICS CO LTD (2)· patent assignee history
1998–2001Patents assigned to AJINOMOTO KK (5)· patent assignee history
1998–2001Based in Kawasaki, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
AJINOMOTO KK51998–2001
MEIKO ELECTRONICS CO LTD21988–1991
KOITO MFG CO LTD11977
Locations
LocationPatentsSpan
Kawasaki, JP51998–2001
Shizuoka, JP31977–1991