Inventor

Hiroshi Ohkawa

Inventor

Tokyo, JP

Overview

1978–2020

Patent span

Electricity

Primary field (CPC H)

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

H10Dprimary

H10DInorganic electric semiconductor devices9%

LOCD29%

H01MProcesses or means, e.g. batteries, for the direct conversion of chemical energy into electrical energy6%

H01RElectrically-conductive connections6%

H05BElectric heating6%

Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution6%

A47GHousehold or table equipment3%

A61GTransport, personal conveyances, or accommodation specially adapted for patients or disabled persons3%

B63BShips or other waterborne vessels3%

F01NGas-flow silencers or exhaust apparatus for machines or engines in general3%

PatentTitleYear

Assembled from patent assignee/location history and declaration credentials.

1978–2016Patents assigned to OHKAWA HIROSHI (3)· patent assignee history

1978–1996Based in Toyota-shi, Aichi-ken, JP· patent location history

1981–1987Patents assigned to TOMY KOGYO CO (4)· patent assignee history

1981–1993Based in Tokyo, JP· patent location history

1988Patents assigned to JAPAN ENGINE VALVE MFG (2)· patent assignee history

1988Based in Nagaoka, JP· patent location history

1992–1993Patents assigned to HIROSE ELECTRIC CO LTD (2)· patent assignee history

2010–2014Patents assigned to PANASONIC CORP (3)· patent assignee history

2014Based in Toyama, JP· patent location history

2016–2020Based in Nisshin, JP· patent location history

Assignee and location history derived from the patent record.

Assignees

Locations