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Inventor

Iwao Hatakeyama

Inventor
Mito, JP

Overview

4→
Patents
1985–1991
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 transducer33%
H01FMagnets33%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests33%
PatentTitleYear
5,051,970'Magneto-optic recording system with overwrite capability'19914,642,245'Iron oxide magnetic film and process for fabrication thereof'19874,618,901'High density magnetic head'19864,544,612'Iron oxide magnetic film and process for fabrication thereof'1985

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1985–1991Patents assigned to NIPPON TELEGRAPH & TELEPHONE (4)· patent assignee history
1985–1987Based in Mito, JP· patent location history
1986Based in Ibaraki, JP· patent location history
1991Based in Ibaragi, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
NIPPON TELEGRAPH & TELEPHONE41985–1991
Locations
LocationPatentsSpan
Mito, JP21985–1987
Ibaragi, JP11991
Ibaraki, JP11986