Inventor
NAGATA KEN ICHI
JP44 patents
⚠️ This page may combine multiple inventors who share the name “NAGATA KEN ICHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD
42 patentsUS6456584B1Sep 24, 2002
Optical information recording medium comprising a first layer having a phase that is reversibly changeable and a second information layer having a phase that is reversibly changeable
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD170 citations99
US5764619AJun 9, 1998
Optical recording medium having two separate recording layers
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD123 citations99
US6894962B1May 17, 2005
Optical information recording medium with sector address information
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD70 citations98
US6795389B1Sep 21, 2004
Optical information recording medium with substrate and multiple information
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD86 citations98
US6487151B1Nov 26, 2002
Optical information recording and reproducing system with overwrite capability and recording medium for use therewith
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD47 citations96
US6434095B1Aug 13, 2002
Optical information recording medium, manufacturing method therefor, manufacturing apparatus therefor, and optical information recording and reproducing apparatus
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD25 citations96
US6229785B1May 8, 2001
Optical information recording medium, its manufacturing method, optical information recording/reproducing method and optical information recorder/reproducer
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD66 citations96
US6031814AFeb 29, 2000
Optical disk with stop-pulse generating means in a guide groove
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD42 citations96
US6807142B1Oct 19, 2004
Optical information recording medium and method for initializing the same
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD23 citations93
US6771587B2Aug 3, 2004
Optical information recording medium, with plural information layers
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD22 citations93
US6707776B2Mar 16, 2004
Recording and reproducing method of optical information recording medium
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD16 citations93
US6611491B2Aug 26, 2003
Optical recording medium having dual recording layers
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD18 citations93
US6226239B1May 1, 2001
Optical information recording and reproducing apparatus for multiple layer recording medium
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD19 citations93
US5493561AFeb 20, 1996
Optical information recording medium and information recording and reproducing method thereof
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD54 citations93
US5249175ASep 28, 1993
Optical information recording medium and information recording and reproducing method therefor
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD30 citations93
US6821707B2Nov 23, 2004
Optical information recording medium, producing method thereof and method of recording/erasing/reproducing information
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD27 citations92
US6449239B1Sep 10, 2002
Optical information recording medium with thermal diffusion layer
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD42 citations92
US5681632AOct 28, 1997
Optical information recording medium
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD36 citations92
US5294523AMar 15, 1994
Optical information recording medium
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD23 citations91
US5410534AApr 25, 1995
Optical information recording medium
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD33 citations90
US7215620B2May 8, 2007
Information recording medium with management area having recording identification information
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD11 citations84
US7169533B2Jan 30, 2007
Optical information recording medium, method for manufacturing the same and recording/reproduction method
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD11 citations84
US6933031B2Aug 23, 2005
Optical information recording medium and its manufacturing method
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD18 citations84
US6514591B1Feb 4, 2003
Optical information recording medium
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD14 citations84
US6027594AFeb 22, 2000
Method of manufacturing optical information recording medium
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD12 citations82
US7376070B2May 20, 2008
Optical information recording medium and method for manufacturing the medium
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD7 citations74
US7136349B2Nov 14, 2006
Multi-layer optical information recording medium with pits or grooves
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD8 citations74
US7116631B2Oct 3, 2006
Optical information recording medium manfacturing method therefor, manufacturing apparatus therefor, and optical information recording and reproducing apparatus
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD3 citations74
US6388984B2May 14, 2002
Optical information recording medium and its recording and reproducing method
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD11 citations74
US5273861ADec 28, 1993
Optical information recording medium, method of making an optical information recording medium and method of recording/reproducing optical information
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD12 citations74
US7037413B1May 2, 2006
Optical information recording medium, producing method thereof and method of recording/erasing/reproducing information
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD9 citations73
US7169455B2Jan 30, 2007
Optical information recording medium and method for manufacturing the same
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD2 citations63
US7154841B2Dec 26, 2006
Optical information recording medium
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD5 citations63
US7106686B2Sep 12, 2006
Optical information recording medium, method of manufacturing thereof, and method of recording and reproduction
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD4 citations63
US6744724B2Jun 1, 2004
Recording and reproducing method for optical information recording medium and optical information recording medium
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD3 citations63
US6697313B2Feb 24, 2004
Optical information recording and reproducing system with overwrite capability and recording medium for use therewith
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD2 citations63
US6683739B2Jan 27, 2004
Optical information recording and reproducing system with overwrite capability and recording medium for use therewith
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD2 citations63
US6663934B2Dec 16, 2003
Optical information recording medium
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD4 citations63
US6587420B1Jul 1, 2003
Recording and reproducing method for optical information recording medium and optical information recording medium
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD4 citations63
US5449589ASep 12, 1995
Method of making an optical information recording medium and method of recording/reproducing optical information
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD2 citations63
US7423957B2Sep 9, 2008
Optical information recording medium and method of manufacturing thereof, manufacturing apparatus, recording/reproducing method, and recording/reproducing apparatus
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD0 citations52
US7014904B2Mar 21, 2006
Optical information recording medium and method for manufacturing the medium
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD0 citations52