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Inventor

Shizuo Umemura

Inventor
Kanagawa, JP

Overview

16→
Patents
1984–2003
Patent span
General tagging of new technological developments
Primary field (CPC Y)

Patents· 16 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 transducer21%
Y10TTechnical subjects covered by former us classification19%
H01FMagnets14%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests14%
B22FWorking metallic powder10%
B41MPrinting, duplicating, marking, or copying processes5%
G03GElectrography5%
C22CAlloys2%
C23CCoating metallic material2%
G02BOptical elements, systems or apparatus2%
PatentTitleYear
6,519,387'Image recording device and optical fiber'20035,981,042'Medium for recording information on ferroelectric material using polarization'19995,684,522'Method of recording information on ferroelectric material using polarization'19975,418,029'Information recording medium and method'19955,371,729'Information recording method'19945,055,353'Magneto-optical recording medium'19914,983,025'Magneto-optical thin film'19914,822,673'Microwave device'19894,805,145'Method for recording and reproducing information'19894,713,258'Method of forming ultrafine patterns'19874,608,093'Ferromagnetic particles with stable magnetic characteristics and method of preparing same'19864,554,089'Ferromagnetic particles with stable magnetic characteristics and method of preparing same'19854,487,627'Method for preparing ferromagnetic metal particles'19844,481,253'Process for preparing ferromagnetic metal powder and a magnetic recording medium including the powder'19844,475,946'Ferromagnetic metal particles of iron alloyed with Ti, V, Cr, Mn, Co, Ni, Cu, Zn, Si, P, Mo, Sn, Sb and Ag coated with mono- or dialkoxysilanes'19844,437,882'Ferromagnetic powder treated with an organic silane compound'1984

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1984–2003Patents assigned to FUJI PHOTO FILM CO LTD (14)· patent assignee history
1984–2003Based in Kanagawa, JP· patent location history
1987–1989Patents assigned to JAPAN RES DEV CORP (3)· patent assignee history
1987–1989Based in Ibaraki, JP· patent location history
1989Based in Ibaragi, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
FUJI PHOTO FILM CO LTD141984–2003
JAPAN RES DEV CORP31987–1989
Locations
LocationPatentsSpan
Kanagawa, JP131984–2003
Ibaraki, JP21987–1989
Ibaragi, JP11989