Inventor

Masahiro Kawakami

Inventor
Tokyo, JP

Overview

20→
Patents
1990–2019
Patent span
Chemistry
Primary field (CPC C)

Patents· 20 as inventor

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

C21Bprimary
C21BManufacture of iron or steel23%
Y02PClimate change mitigation technologies in the production or processing of goods20%
C21CProcessing of pig-iron, e.g. refining, manufacture of wrought-iron or steel15%
C22BProduction and refining of metals7%
C22CAlloys3%
H04NPictorial communication, e.g. television3%
H10DInorganic electric semiconductor devices3%
H10PGeneric processes or apparatus for the manufacture or treatment of devices covered by class h103%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests3%
C01BNon-metallic elements2%

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1990–2005Patents assigned to NIPPON KOKAN KK (14)· patent assignee history
1990–1994Based in Tokyo, JP· patent location history
1994–1997Patents assigned to SONY CORP (2)· patent assignee history
1995Patents assigned to KANSAI COKE & CHEMICALS (1)· patent assignee history
1996Patents assigned to HITACHI CHEMICAL CO LTD (1)· patent assignee history
1997Based in Kanagawa, JP· patent location history
2005Based in Fukuyama, JP· patent location history
2011–2019Patents assigned to TOYOTA MOTOR CO LTD (2)· patent assignee history
2011Based in Toyota, JP· patent location history
2019Based in Nissin, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
NIPPON KOKAN KK141990–2005
SONY CORP21994–1997
TOYOTA MOTOR CO LTD22011–2019
HITACHI CHEMICAL CO LTD11996
KANSAI COKE & CHEMICALS11995
Locations
LocationPatentsSpan
Tokyo, JP141990–1994
Nissin, JP12019
Toyota, JP12011
Fukuyama, JP12005
Kanagawa, JP11997