Inventor

Masashi Hayama

Inventor

Tokyo, JP

Overview

1981–2021

Patent span

General tagging of new technological developments

Primary field (CPC Y)

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 transducer31%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests31%

Y10TTechnical subjects covered by former us classification27%

H04BTransmission4%

H04NPictorial communication, e.g. television4%

H04WWireless communication networks4%

PatentTitleYear

Assembled from patent assignee/location history and declaration credentials.

1981–1983Patents assigned to TDK ELECTRONICS CO LTD (6)· patent assignee history

1981Based in Usada, JP· patent location history

1983–2021Based in Tokyo, JP· patent location history

1987–1991Patents assigned to TDK CORP (2)· patent assignee history

1987Based in Usuda, JP· patent location history

1991Based in Saku, JP· patent location history

2021Patents assigned to MITSUBISHI ELECTRIC CORP (1)· patent assignee history

Assignee and location history derived from the patent record.

Assignees

Locations