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Inventor

Haruhiko Takemura

Inventor
Hino, JP

Overview

4→
Patents
1986–1996
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.

G11Bprimary
G11BInformation storage based on relative movement between record carrier and transducer67%
H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light33%
PatentTitleYear
5,555,232'Optical head with built-in semiconductor laser, objective lens and 1/4 wavelength plate'19964,728,188'Light source degeradation detecting apparatus for laser device'1988D0288558'Optical pickup for use in optical discs'19874,574,371'Apparatus for recording and reproducing information on an optical disc'1986

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1986–1996Patents assigned to OLYMPUS OPTICAL CO (4)· patent assignee history
1986–1987Based in Hino, JP· patent location history
1988Based in Tokyo, JP· patent location history
1996Based in Hachioji, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
OLYMPUS OPTICAL CO41986–1996
Locations
LocationPatentsSpan
Hino, JP21986–1987
Hachioji, JP11996
Tokyo, JP11988