Inventor

Yasumichi Tokuoka

Inventor

Saku, JP

Overview

1976–2010

Patent span

General tagging of new technological developments

Primary field (CPC Y)

Patents· 27 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 transducer29%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests16%

Y10TTechnical subjects covered by former us classification14%

H01FMagnets12%

B22FWorking metallic powder10%

H01GCapacitors6%

B03CMagnetic or electrostatic separation of solid materials from solid materials or fluids1%

C01GCompounds containing metals not covered by subclasses c01d or c01f1%

C01PIndexing scheme relating to structural and physical aspects of solid inorganic compounds1%

C04BLime, magnesia1%

PatentTitleYear

7,641,727'Electrode level difference absorbing print paste and method of producing electronic device'2010 7,638,010'Multilayer ceramic device and the production method thereof'2009 6,550,117'Multilayer ceramic electronic element and manufacturing method therefor'2003 6,124,769'Electronic device, and its fabrication method'2000 5,419,938'Magnetic recording medium comprising two magnetic layers of hexagonal ferrite magnetic particles and binder wherein the easy axes of the particle is specified'1995 5,277,977'Ferromagnetic stabilized ultrafine spherical hexagonal crystalline Fe.sub.2'1994 5,256,479'Ferromagnetic ultrafine particles, method of making, and recording medium using the same'1993 5,221,322'Method of making ferromagnetic ultrafine particles'1993 5,182,693'Magnetic disk'1993 5,160,761'Method for making a magnetic disk'1992 5,140,486'Magnetic recording and reproduction'1992 4,684,546'Method of making a magnetic recording medium'1987 4,670,337'Magnetic recording medium'1987 4,663,246'Magnetic recording medium'1987 4,599,266'Magnetic recording medium'1986 4,348,430'Process for producing magnetic particles for magnetic recording medium'1982 4,347,291'Magnetic recording medium and preparation thereof'1982 4,339,425'Process for producing acicular hydrated ferric oxide particles'1982 4,309,459'Process for producing SiO.sub.2 coated iron oxide powder for use in the preparation of acicular magnetic iron or iron oxide powder'1982 4,222,798'Method of manufacturing ferromagnetic metal powder'1980 4,221,614'Method of manufacturing ferromagnetic magnetic metal powder'1980 4,113,528'Method of preventing deterioration of characteristics of ferromagnetic metal or alloy particles'1978 4,097,313'Method of recovery of ferromagnetic metal or alloy particles by using a magnetic drum'1978 4,069,367'Magnetic powder material comprising iron oxide particles with a copper-cobalt alloy coating'1978 4,067,755'Method of making powdered magnetic iron oxide material'1978 4,010,310'Magnetic powder'1977 3,953,656'Magnetic recording medium and preparation thereof'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1982Patents assigned to TDK ELECTRONICS CO LTD (12)· patent assignee history

1976–1987Based in Tokyo, JP· patent location history

1978–1994Based in Saku, JP· patent location history

1980Based in Komoro, JP· patent location history

1986–2010Patents assigned to TDK CORP (15)· patent assignee history

2000–2003Based in Chiba, JP· patent location history

2009–2010Based in Chuo-ku, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
TDK CORP	15	1986–2010
TDK ELECTRONICS CO LTD	12	1976–1982

Locations

Location	Patents	Span
Saku, JP	10	1978–1994
Tokyo, JP	10	1976–1987
Chuo-ku, JP	2	2009–2010
Chiba, JP	2	2000–2003
Komoro, JP	2	1980