Inventor · Hirakata, JP

Motoyoshi Murakami

32Patents
8h-index
21Co-inventors
71Inventor score

Filing activity: Apr 14, 1989 → Jan 31, 2007

Most-cited inventions

PatentTitleAreaCited byStatus
US6266299A Magneto-optical disk having write-once identification marks and method for recording thereof Physics 78 Expired
US6973015B1 Optical disk, method for recording and reproducing additional information to and from optical disk, reproducing apparatus for optical disk, and recording and reproducing apparatus for optical disk Physics 23 Expired
US5656370A Optical recording medium Emerging Cross-Sectional Technologies 18 Expired
US4952295A Method of producing a deposition film of composite material Physics 17 Expired
US5582891A Optical disk substrate with land planes of uniform height Emerging Cross-Sectional Technologies 13 Expired
US6018511A Magneto-optical recording medium and readout method of the same Physics 9 Expired
US6519211B1 Magneto-optical recording medium having magnetic domain shrinks and disappears Physics 9 Expired
US6584046B2 Method for reproducing information data from magneto-optical recording medium using linear polarized beam Physics 8 Expired
US6826131B2 Magneto-optical recording medium having multiple magnetic layers Physics 8 Expired
US6767697B2 Magneto-optical disk and method for producing same by initializing with a laser having a predetermined wavelength Emerging Cross-Sectional Technologies 7 Expired
US5518826A Magneto-optical recording medium and method of manufacturing same Emerging Cross-Sectional Technologies 5 Expired
US7590031B2 Optical recording medium having BCA of write-once information Physics 4 Active
US6504797B1 Magneto-optical recording medium having multiple magnetic layers and reproducing method thereof Physics 3 Expired
US6788624B2 Method and apparatus for reproducing information from a magneto-optical recording medium Physics 2 Expired
US5679386A Optical disk formation member for making an optical disk substrate Emerging Cross-Sectional Technologies 2 Expired
US7535803B2 Method for recording to and reproducing from a magnetic recording medium, recording and reproduction device for the same, and magnetic recording medium Emerging Cross-Sectional Technologies 2 Active
US5472758A Optical recording medium for short-wavelength of laser beam and read/write/erase method using the medium Emerging Cross-Sectional Technologies 2 Expired
US7180831B2 Magneto-optical recording medium having a recording layer of columnar structure Physics 2 Expired
US5565278A Magneto-optical recording medium Emerging Cross-Sectional Technologies 2 Expired
US7414924B2 Magneto-optical recording medium having watermark for preventing unauthorized copy Physics 2 Active
US6747919B2 Magneto-optical recording medium, and method and apparatus for producing the same Physics 2 Expired
US7251200B2 Apparatus for reproducing information data from magneto-optical recording medium using linear polarized beam Physics 2 Expired
US6853606B2 Magneto-optical storage medium capable of transferring magnetic domain from recording layer to reproducing layer Physics 1 Expired
US7012857B2 Magneto optical recording medium having a multilayer recording film of different thickness Physics 1 Expired
US6975564B2 Magneto-optical recording medium for use in domain wall displacement detection system, and method for producing the same Emerging Cross-Sectional Technologies 1 Expired

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.