Inventor
OKADA MITSUYA
JP16 patents
Patents
16 patentsUS6115336ASep 5, 2000
Apparatus for optically recording data into a disc
NEC CORP26 citations92
US5878022AMar 2, 1999
High density optical information recording medium using high refractive index layer
NEC CORP25 citations92
US5631895AMay 20, 1997
Optical information recording medium
NEC CORP32 citations92
US5521901AMay 28, 1996
Re-writable phase change type optical disk with suppressed recording mark distortion
NEC CORP23 citations92
US5708653AJan 13, 1998
Single-substrate multi-layer optical disk for read-only storage and phase change rewritable storage
NEC CORP55 citations90
US7489620B2Feb 10, 2009
Optical information recording and reproducing medium
NEC CORP15 citations83
US6606293B1Aug 12, 2003
Optical information recording medium and methods for recording, reading, and erasing information thereupon
NEC CORP9 citations73
US4862437AAug 29, 1989
Magneto-optical recording reproducing, and erasing apparatus having two independent magnetic field applying devices
NEC CORP16 citations73
US5798993AAug 25, 1998
System and method for simultaneously verifying optical data writing and optical data writing medium for use therein
NEC CORP6 citations72
US5862122AJan 19, 1999
Phase change optical disk and a method for recording and playbacking optical information on or from an optical disk
NEC CORP3 citations62
US5381395AJan 10, 1995
Information detection of a phase-change type optical recording medium by shifting the phase of a reference light
NEC CORP6 citations62
US5906908AMay 25, 1999
System and method for simultaneously verifying optical data writing and optical data writing medium for use therein
NEC CORP2 citations61
US6117511ASep 12, 2000
Optical recording media
NEC CORP2 citations56
US6807143B1Oct 19, 2004
Information-recording medium and information reproducing apparatus
NEC CORP0 citations51
US6122243ASep 19, 2000
Optical information recording apparatus, optical recording medium, and method or judging tracking polarity of optical recording medium
NEC CORP1 citations51
US7102990B2Sep 5, 2006
Optical information-recording medium and optical information recording/reproducing method
NEC CORP0 citations41