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Inventor

Souichi Tohyama

Inventor
Ibaraki, JP

Overview

3→
Patents
1992–2004
Patent span
Physics
Primary field (CPC G)

Patents· 3 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 transducer40%
G02BOptical elements, systems or apparatus20%
G05BControl or regulating systems in general20%
H05KPrinted circuits20%
PatentTitleYear
6,703,603'Controller for optical scanner'20045,229,896'Disk drive and method of controlling the same'19935,164,931'Method and apparatus for control of positioning'1992

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1992–1993Patents assigned to HITACHI LTD (2)· patent assignee history
1992–1993Based in Ibaraki, JP· patent location history
2004Patents assigned to HITACHI VIA MECHANICS LTD (1)· patent assignee history
2004Based in Tsuchiura, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI LTD21992–1993
HITACHI VIA MECHANICS LTD12004
Locations
LocationPatentsSpan
Ibaraki, JP21992–1993
Tsuchiura, JP12004