Inventor
VAN KAZUO
JP28 patents
Patents
28 patentsUS5399461AMar 21, 1995
Optical disk for use in optical memory devices
SHARP KK81 citations95
US5674583AOct 7, 1997
Optical recording medium and manufacturing method thereof
SHARP KK31 citations93
US5666345ASep 9, 1997
Optical memory medium with predetermined guide tracks and prepits
SHARP KK19 citations93
US5338646AAug 16, 1994
Optical memory device having an improved light reflection or optical memory layer
SHARP KK20 citations93
US5088086AFeb 11, 1992
Optical recording medium and the method of recording, reading, and erasing information using it
SHARP KK22 citations93
US5981039ANov 9, 1999
Magnetic recording medium and a manufacturing method thereof as well as a photo-printing apparatus using such a magnetic recording medium
SHARP KK21 citations92
US5087535AFeb 11, 1992
Method of manufacturing photo-mask and photo-mask manufactured thereby
SHARP KK27 citations92
US5170390ADec 8, 1992
Optical recording element and driving system
SHARP KK14 citations82
US5079113AJan 7, 1992
Photo-mask
SHARP KK20 citations82
US5989671ANov 23, 1999
Optical recording medium and manufacturing method thereof
SHARP KK10 citations74
US5457006AOct 10, 1995
Method of manufacturing photo-mask and photo-mask manufactured thereby
SHARP KK13 citations74
US5438561AAug 1, 1995
Method for recording and reproducing information using an optical memory
SHARP KK10 citations74
US5403683AApr 4, 1995
Photo-mask
SHARP KK10 citations74
US5260150ANov 9, 1993
Photo-mask with light shielding film buried in substrate
SHARP KK6 citations74
US5214636AMay 25, 1993
Optical recording element having a plurality of thin film filtering layers and optical recording element having an electrically conductive layer
SHARP KK11 citations74
US5192644AMar 9, 1993
Optical memory device
SHARP KK16 citations74
US5175079ADec 29, 1992
Optical memory device
SHARP KK15 citations74
US5500850AMar 19, 1996
Optical disk with grooves and pits of different depths
SHARP KK13 citations73
US5459711AOct 17, 1995
Optical recording element and driving system
SHARP KK11 citations73
US5058099AOct 15, 1991
Magneto-optical memory element
SHARP KK6 citations73
US5754523AMay 19, 1998
Optical memory medium with preformed pit arrangement
SHARP KK4 citations63
USRE35629EOct 14, 1997
Magneto-optical memory element
SHARP KK2 citations63
US5605779AFeb 25, 1997
Optical memory medium
SHARP KK5 citations63
US5081614AJan 14, 1992
Magneto-optical head utilizing central and peripheral portions of reflected light flux for different purposes
SHARP KK2 citations63
US4754355AJun 28, 1988
Optical head
SHARP KK3 citations63
US5335220AAug 2, 1994
Optical recording element and driving system
SHARP KK2 citations62
US5707754AJan 13, 1998
Magnetic recording medium and thermal recording printing device adopting the same
SHARP KK1 citations51
US5305254AApr 19, 1994
Magneto-optic memory device
SHARP KK1 citations50