Inventor

Atsuyuki Watada

Inventor

Kawasaki, JP

Overview

1987–2009

Patent span

Physics

Primary field (CPC G)

Patents· 18 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 transducer32%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests13%

Y10TTechnical subjects covered by former us classification13%

H01FMagnets9%

B82YSpecific uses or applications of nanostructures6%

H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light6%

C01GCompounds containing metals not covered by subclasses c01d or c01f4%

C01PIndexing scheme relating to structural and physical aspects of solid inorganic compounds4%

C04BLime, magnesia4%

G02BOptical elements, systems or apparatus4%

PatentTitleYear

7,590,159'Surface-emission laser diode operable in the wavelength band of 1.1-1.7 micrometers and optical telecommunication system using such a laser diode'2009 7,413,788'Write-once-read-many optical recording media and process for recording and reproducing information on the media'2008 7,245,647'Surface-emission laser diode operable in the wavelength band of 1.1-1.7mum and optical telecommunication system using such a laser diode'2007 6,975,663'Surface-emission laser diode operable in the wavelength band of 1.1-7Î¼m and optical telecommunication system using such a laser diode'2005 6,933,032'Write-once-read-many optical recording media and process for recording and reproducing information on the media'2005 5,736,265'Magneto-optical recording medium and recording method using the same'1998 5,487,046'Magneto-optical recording medium having two magnetic layers with the same curie temperature'1996 5,459,701'Magneto-optical recording method'1995 5,430,696'Magneto-optical recording medium'1995 5,420,833'Magneto-optical recording medium having first and second magnetic layers'1995 5,369,629'Magneto-optical recording method and magneto-optical recording medium'1994 5,337,293'Magneto-optical recording method and recording medium for use in the same'1994 5,323,366'Magneto-optical recording method with switching and maintaining perpendicular magnetization light beam application modes'1994 4,797,331'Magneto-optical recording material'1989 4,788,095'Metal oxide magnetic substance and a magnetic film consisting thereof and their uses'1988 4,690,861'Magneto optical recording medium'1987 4,670,323'Magneto-optic recording medium having a metal oxide recording layer'1987 4,670,322'Metal oxide magnetic substance and a magnetic film consisting thereof and their uses'1987

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1987–2009Patents assigned to RICOH KK (18)· patent assignee history

1987–1989Based in Numazu, JP· patent location history

1994–1998Based in Kawasaki, JP· patent location history

2005–2009Based in Shizuoka, JP· patent location history

2005Based in Mishima, JP· patent location history

2008Based in Shizouka, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
RICOH KK	18	1987–2009

Locations

Location	Patents	Span
Kawasaki, JP	8	1994–1998
Numazu, JP	5	1987–1989
Shizuoka, JP	3	2005–2009
Shizouka, JP	1	2008
Mishima, JP	1	2005