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Inventor

Yoshisuke Yamakawa

Inventor
Niiza, JP

Overview

5→
Patents
1987–1996
Patent span
General tagging of new technological developments
Primary field (CPC Y)

Patents· 5 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 transducer28%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests28%
Y10TTechnical subjects covered by former us classification28%
B24BMachines, devices, or processes for grinding or polishing6%
B24DTools for grinding, buffing or sharpening6%
H04NPictorial communication, e.g. television6%
PatentTitleYear
5,532,041'Magnetic recording media and method for making them'19965,110,659'Lapping tape'19925,043,210'Magnetic recording media having two magnetic layers; the first for recording a baseboard signal and the second for recording a superimposed surface and signal'19914,684,546'Method of making a magnetic recording medium'19874,663,246'Magnetic recording medium'1987

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1987–1996Patents assigned to TDK CORP (5)· patent assignee history
1987Based in Tokyo, JP· patent location history
1991–1996Based in Niiza, JP· patent location history
1992Based in Saku, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
TDK CORP51987–1996
Locations
LocationPatentsSpan
Niiza, JP21991–1996
Tokyo, JP21987
Saku, JP11992