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Inventor

Noboru Ogawa

Inventor
Machida, JP

Overview

7→
Patents
1986–2006
Patent span
Electricity
Primary field (CPC H)

Patents· 7 as inventor

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

H04Bprimary
H04BTransmission19%
H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems13%
D01DMechanical methods or apparatus in the manufacture of artificial filaments, threads, fibres, bristles or ribbons6%
D01FChemical features in the manufacture of artificial filaments, threads, fibres, bristles or ribbons6%
E03CDomestic plumbing installations for fresh water or waste water6%
F16LPipes6%
G05FSystems for regulating electric or magnetic variables6%
H02PControl or regulation of electric motors, electric generators or dynamo-electric converters6%
H03GControl of amplification6%
H03KPulse technique6%
PatentTitleYear
7,123,648'Radio relay apparatus'20066,671,502'Control device for radio repeater in communication field'20036,493,537'Apparatus and method for preventing oscillations in a radio repeater device'20026,431,610'Tube assembly for communicating water to a fixture'20025,298,848'Large capacity variable speed PWM spatial vector type sub-harmonic system for driving AC electric motor'19944,818,458'Method of producing acrylic fibers'19894,626,976'Switch mode power supply having magnetically controlled output'1986

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1986–1994Patents assigned to HITACHI LTD (2)· patent assignee history
1986Patents assigned to HITACHI METALS LTD (1)· patent assignee history
1986–1994Based in Hitachi, JP· patent location history
1989Based in Okayama, JP· patent location history
2002–2003Patents assigned to HARADA IND CO LTD (2)· patent assignee history
2002Patents assigned to BEIJING BORK METAL HOSE CO LTD (1)· patent assignee history
2002Patents assigned to IWATANI INTERNAT CORP (1)· patent assignee history
2002–2003Based in Machida, JP· patent location history
2002Based in Beijing, CN· patent location history
2006Based in Kanagawa, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HARADA IND CO LTD22002–2003
HITACHI LTD21986–1994
BEIJING BORK METAL HOSE CO LTD12002
HITACHI METALS LTD11986
IWATANI INTERNAT CORP12002
Locations
LocationPatentsSpan
Machida, JP22002–2003
Hitachi, JP21986–1994
Kanagawa, JP12006
Beijing, CN12002
Okayama, JP11989