Inventor

Ken Umehara

Inventor

Chiba, JP

Overview

1993–2011

Patent span

Mechanical engineering

Primary field (CPC F)

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

F02Dprimary

F02DControlling combustion engines19%

G03GElectrography19%

Y02TClimate change mitigation technologies related to transportation19%

F01NGas-flow silencers or exhaust apparatus for machines or engines in general13%

C08GMacromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds6%

F02BInternal-combustion piston engines6%

F02MSupplying combustion engines in general with combustible mixtures or constituents thereof6%

F02PIgnition, other than compression ignition, for internal-combustion engines6%

Y02ATechnologies for adaptation to climate change6%

PatentTitleYear

Assembled from patent assignee/location history and declaration credentials.

1993–1999Patents assigned to MAZDA MOTOR (3)· patent assignee history

1993–1999Based in Higashihiroshima, JP· patent location history

1994Based in Hiroshima, JP· patent location history

2010Patents assigned to RICOH KK (2)· patent assignee history

2010–2011Based in Chiba, JP· patent location history

2010Based in Tokyo, JP· patent location history

2011Patents assigned to RICOH CO LTD (1)· patent assignee history

Assignee and location history derived from the patent record.

Assignees

Locations