Inventor

Ken-ichi Itoh

Inventor

Yamato, JP

Overview

19→

Patents

1976–2009

Patent span

Physics

Primary field (CPC G)

Patents· 19 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 digests20%

C07DHeterocyclic compounds6%

A61PSpecific therapeutic activity of chemical compounds or medicinal preparations3%

B60GVehicle suspension arrangements3%

B60LPropulsion of electrically-propelled vehicles3%

B62DMotor vehicles3%

B82YSpecific uses or applications of nanostructures3%

C30BSingle-crystal growth3%

G01DMeasuring not specially adapted for a specific variable3%

PatentTitleYear

7,576,220'Method of producing 1,2,4-oxadiazole derivatives'2009 7,495,107'Method for manufacturing isoxazole derivative or dihydroisoxazole derivative'2009 7,397,627'Method of detecting position of head for recording medium'2008 7,112,377'Magnetic recording medium, method of manufacturing the same, magnetic medium substrate employed in the magnetic recording medium, and magnetic storage unit'2006 6,879,107'Plasma display panel and fabrication method of the same'2005 6,650,677'Up-conversion laser'2003 5,615,057'Image record/playback apparatus including a photographing device and a connectable playback device'1997 5,583,385'Power converting device for reducing an induction problem'1996 5,526,270'Apparatus for removing off-set from measured quantity'1996 5,353,265'Magneto optical overwriting methods using a single optical head designed for a two-beam overwrite'1994 5,144,601'Magneto-optical overwriting methods using erasing pulses, each of which has a higher frequency and narrower width than that of the overwriting pulses'1992 5,138,572'Optical information memory medium including indium (In) and bismuth (Bi)'1992 5,072,423'Optical information memory medium recording and erasing information including gallium and antimony'1991 5,058,061'Method for recording information in an optical information memory medium including indium (In) and Antimony (Sb)'1991 4,947,372'Optical information memory medium for recording and erasing information'1990 4,746,569'Longitudinal magnetic coated recording medium'1988 4,622,664'Channel control system for loop type signal transmission channel'1986 4,534,821'Single crystal growing of rare earth-gallium garnet'1985 3,944,975'Signal checking system'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1996Patents assigned to HITACHI LTD (2)· patent assignee history

1986Patents assigned to JAPAN NATIONAL RAILWAY (1)· patent assignee history

1986–2005Based in Tokyo, JP· patent location history

1988–2008Patents assigned to FUJITSU LTD (9)· patent assignee history

1988–2003Based in Yamato, JP· patent location history

1996Based in Suwa, JP· patent location history

1997–2003Patents assigned to TOSHIBA KK (2)· patent assignee history

2006–2008Based in Kawasaki, JP· patent location history

2009Patents assigned to RIKKYO GAKUIN (2)· patent assignee history

2009Based in Saitama, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
FUJITSU LTD	9	1988–2008
HITACHI LTD	2	1976–1996
RIKKYO GAKUIN	2	2009
TOSHIBA KK	2	1997–2003
JAPAN NATIONAL RAILWAY	1	1986

Locations

Location	Patents	Span
Yamato, JP	9	1988–2003
Saitama, JP	2	2009
Kawasaki, JP	2	2006–2008
Tokyo, JP	2	1986–2005
Suwa, JP	1	1996