Mitsuya Okada — 16 Patents at Nec

Mitsuya Okada has been granted 16 US patents while listed as an inventor at Nec. The first was granted in 1989 and the most recent in February 2009. Mitsuya Okada ranks #284,196 of 4,157,543 US inventors in our database (top 6.8%). Patent records list Mitsuya Okada in Tokyo, JP.

Patents per Year

Issued Patents All Time

Showing 1–16 of 16 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
7489620	Optical information recording and reproducing medium	Toshiaki Iwanaga, Takeharu Shibatoko, Hideki Tanabe, Masashi Kubota, Masaki Nakano +1 more	2009-02-10
7102990	Optical information-recording medium and optical information recording/reproducing method	—	2006-09-05	$28,000
6807143	Information-recording medium and information reproducing apparatus	—	2004-10-19	$37,000
6606293	Optical information recording medium and methods for recording, reading, and erasing information thereupon	Shuichi Ohkubo, Masaki Itoh	2003-08-12	$47,000
6122243	Optical information recording apparatus, optical recording medium, and method or judging tracking polarity of optical recording medium	—	2000-09-19	$79,000
6117511	Optical recording media	Masaki Itoh, Syu-Ichi Ohkubo	2000-09-12	$74,000
6115336	Apparatus for optically recording data into a disc	—	2000-09-05	$75,000
5906908	System and method for simultaneously verifying optical data writing and optical data writing medium for use therein	Shuichi Ohkubo, Masaki Itou	1999-05-25	$29,000
5878022	High density optical information recording medium using high refractive index layer	Masatsugu Ogawa	1999-03-02	$17,000
5862122	Phase change optical disk and a method for recording and playbacking optical information on or from an optical disk	Shuichi Ohkubo	1999-01-19	$16,000
5798993	System and method for simultaneously verifying optical data writing and optical data writing medium for use therein	Shuichi Ohkubo, Masaki Itou	1998-08-25	$15,000
5708653	Single-substrate multi-layer optical disk for read-only storage and phase change rewritable storage	Syuichi Ohkubo	1998-01-13	$21,000
5631895	Optical information recording medium	Tatsunori Ide, Shuichi Ohkubo	1997-05-20	$26,000
5521901	Re-writable phase change type optical disk with suppressed recording mark distortion	Shuichi Ohkubo, Tatsunori Ide	1996-05-28	$12,000
5381395	Information detection of a phase-change type optical recording medium by shifting the phase of a reference light	—	1995-01-10	$28,000
4862437	Magneto-optical recording reproducing, and erasing apparatus having two independent magnetic field applying devices	—	1989-08-29	$30,000

Mitsuya Okada — 16 Patents

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