Inventor · disambiguated record
Masafumi Yoshihiro
Also filed as: YOSHIHIRO MASAFUMI
23 granted patents·3 pending applications·396 citations·filing 1992–2005
96Inventor score
Top patents by PatentIndex Score
26 records- 0192US6101153AMagnetic head capable of generating multi-stepped external magnetic fields for magneto-optical recording deviceHITACHI MAXELL·Filed 1998·Granted Aug 8, 2000·62 cites·7 claims
- 0289US6160769AOptical recording medium and optical recording deviceHITACHI MAXELL·Filed 1998·Granted Dec 12, 2000·51 cites·10 claims
- 0387US6434088B1Recording and reproducing apparatus having a magneto-optical head with an objective lens and laser-beam-permeable memberHITACHI MAXELL·Filed 2000·Granted Aug 13, 2002·19 cites·19 claims
- 0484US6385141B1Magneto-optical recording method capable of adjusting the sizes magnetic domainHITACHI MAXELL·Filed 2000·Granted May 7, 2002·18 cites·17 claims
- 0581US6366541B1Optical recording medium with solid protective layer having self-lubricating propertyHITACHI MAXELL·Filed 2000·Granted Apr 2, 2002·13 cites·25 claims
- 0679US6693854B2Reproducing method and reproducing apparatus for magneto-optical recording mediumHITACHI MAXELL·Filed 2003·Granted Feb 17, 2004·11 cites·32 claims
- 0778US6246640B1Magneto-optical recording medium capable of recording multiple value signalsHITACHI MAXELL·Filed 1998·Granted Jun 12, 2001·25 cites·7 claims
- 0875US6044041ARecording and reproducing apparatus having a magneto-optical head with an objective lens and laser-beam-permeable memberHITACHI MAXELL·Filed 1997·Granted Mar 28, 2000·23 cites·16 claims
- 0973US6477118B1Method and apparatus for recording and reproducing information by applying field in a direction other than the direction of magnetization or the direction to a surface of an information recording mediumHITACHI MAXELL·Filed 1999·Granted Nov 5, 2002·28 cites·7 claims
- 1073US6061307AMagneto-optical recording medium having a plurality of magnetic layersHITACHI MAXELL·Filed 1995·Granted May 9, 2000·21 cites·67 claims
- 1169US5783320AMagneto-optical recording medium and process for producing the sameHITACHI MAXELL·Filed 1997·Granted Jul 21, 1998·18 cites·27 claims
- 1268US6424601B1Magneto-optical recording media having an auxiliary magnetic layerHITACHI MAXELL·Filed 1997·Granted Jul 23, 2002·22 cites·45 claims
- 1365US6388954B1Magneto-optical recording medium having clock-marks on recording layer and apparatus for recording and reproducing sameHITACHI MAXELL·Filed 1999·Granted May 14, 2002·18 cites·11 claims
- 1463US6556516B1Reproducing method and reproducing apparatus for magneto-optical recording medium using different radiation patternsHITACHI MAXELL·Filed 1997·Granted Apr 29, 2003·13 cites·14 claims
- 1560US5637411AMagneto-optical recording medium and process for producing the sameHITACHI MAXELL·Filed 1994·Granted Jun 10, 1997·11 cites·13 claims
- 1659US6584044B2Magneto-optical recording apparatus using multiple magnetic field strengths for recording different mark lengthsHITACHI MAXELL·Filed 2002·Granted Jun 24, 2003·3 cites·7 claims
- 1759US6567348B1Method for recording mark length shorter than channel bit length on magneto-optical mediumHITACHI LTD·Filed 1999·Granted May 20, 2003·13 cites·26 claims
- 1852US6385140B2Magneto-optical recording medium and reproducing method for reproducing magnetic domain in enlarged form on a reproducing layerHITACHI MAXELL·Filed 2001·Granted May 7, 2002·1 cites·3 claims
- 1949US6226234B1Magneto-optic recording medium and reproducing method for reproducing magnetic domain in enlarged form on a reproducing layerHITACHI MAXELL·Filed 1996·Granted May 1, 2001·7 cites·27 claims
- 2045US5639563AMagneto-optical recording mediumHITACHI MAXELL·Filed 1994·Granted Jun 17, 1997·5 cites·30 claims
- 2145US5315577AOptical recording/reproducing by changing perpendicular magnetic anisotropy to non-perpendicular magnetic anisotropyHITACHI LTD·Filed 1992·Granted May 24, 1994·6 cites·10 claims
- 2244US2007261068A1Optical recording mediumHITACHI MAXELL·Filed 2005·Application pending·0 cites
- 2342US2003107956A1Magneto-optical recording medium having different magnetic domain radii in recording layer and reproduction layerHITACHI MAXELL·Filed 2002·Application pending·0 cites
- 2441US2002018404A1Magneto-optical recording medium having different magnetic domain radii in recording layer and reproduction layerHITACHI MAXELL·Filed 2001·Application pending·0 cites
- 2538US5965286AMagneto-optical recording mediumHITACHI MAXELL·Filed 1997·Granted Oct 12, 1999·5 cites·8 claims
- 2628US5590097AMagnetooptic recording mediumHITACHI MAXELL·Filed 1994·Granted Dec 31, 1996·3 cites·11 claims
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