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Inventor

Shigehiro Ohnuma

Inventor
Sendai, JP

Overview

3→
Patents
1986–2003
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 transducer22%
B22FWorking metallic powder11%
B82YSpecific uses or applications of nanostructures11%
C23CCoating metallic material11%
G01RMeasuring electric variables11%
H01FMagnets11%
H10NElectric solid-state devices not otherwise provided for11%
Y10TTechnical subjects covered by former us classification11%
PatentTitleYear
6,642,714'Thin-film magnetic field sensor'20034,688,130'Perpendicular magnetic recording medium and production process thereof'19874,584,078'Method of producing fine particles'1986

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1986–1987Patents assigned to JAPAN RES DEV CORP (2)· patent assignee history
1986Patents assigned to MASUMOTO TSUYOSHI (1)· patent assignee history
1986Patents assigned to NAKANOUCHI YUKIO (1)· patent assignee history
1986Patents assigned to OHNUMA SHIGEHIRO (1)· patent assignee history
1986–2003Based in Sendai, JP· patent location history
2003Patents assigned to RES INST FOR ELECTRIC AND MAGN (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
JAPAN RES DEV CORP21986–1987
MASUMOTO TSUYOSHI11986
NAKANOUCHI YUKIO11986
OHNUMA SHIGEHIROself11986
RES INST FOR ELECTRIC AND MAGN12003
Locations
LocationPatentsSpan
Sendai, JP31986–2003