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Inventor

Masaru Chijiiwa

Inventor
Saitama, JP

Overview

4→
Patents
1981–1992
Patent span
Physics
Primary field (CPC G)

Patents· 4 as inventor

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

H04Rprimary
H04RLoudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers33%
G01CMeasuring distances, levels or bearings17%
G01VGeophysics17%
G05DSystems for controlling or regulating non-electric variables17%
G11BInformation storage based on relative movement between record carrier and transducer17%
PatentTitleYear
5,151,872'Method and apparatus for correcting the output of an onboard vehicle terrestrial magnetism sensor'19924,831,464'Signal recording conditioning device'19894,488,012'MFB Loudspeaker'19844,246,446'Moving coil pick-up with coils printed on opposite sides of waver'1981

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1981–1992Patents assigned to PIONEER ELECTRONIC CORP (4)· patent assignee history
1981Based in Tokorozawa, JP· patent location history
1984–1989Based in Saitama, JP· patent location history
1992Based in Kawagoe, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
PIONEER ELECTRONIC CORP41981–1992
Locations
LocationPatentsSpan
Saitama, JP21984–1989
Kawagoe, JP11992
Tokorozawa, JP11981