Patents by Inventor Takahiro Kamikawa

Takahiro Kamikawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • OPTICAL RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME
    Publication number: 20080254262
    Abstract: An optical recording medium includes a first substrate having a groove on the side of an outer peripheral portion thereof; a second substrate in contact with the first substrate in the outer peripheral portion; and a recording layer being disposed in a gap between the first substrate and the second substrate and forming a void in cooperation with the first substrate at the portion of the groove.
    Type: Application
    Filed: September 13, 2007
    Publication date: October 16, 2008
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akiko Hirao, Kazuki Matsumoto, Rumiko Hayase, Norikatsu Sasao, Takahiro Kamikawa
  • Holographic recording medium
    Publication number: 20080145766
    Abstract: A holographic recording medium is provided, which includes a recording layer comprising a three-dimensional cross-linking polymer matrix, a radical polymeric compound, and a photo-radical polymerization initiator. The three-dimensional cross-linking polymer matrix is represented by the following general formula (1): where m is an integer ranging from 3 to 16.
    Type: Application
    Filed: June 29, 2007
    Publication date: June 19, 2008
    Inventors: Satoshi Mikoshiba, Akiko Hirao, Rumiko Hayase, Kazuki Matsumoto, Norikatsu Sasao, Takahiro Kamikawa
  • PHOTOSENSITIVE MATERIAL AND OPTICAL RECORDING MEDIUM USING THE SAME
    Publication number: 20080085467
    Abstract: The present invention relates to a powdery photosensitive material comprising evenly dispersed components and free from a variation in quality, and an optical recording medium produced from the photosensitive material. The photosensitive material is produced by a process including freezing a solution of components that constitutes the photosensitive material dissolved in a first solvent and then drying the resultant solid under reduced-pressure.
    Type: Application
    Filed: October 4, 2007
    Publication date: April 10, 2008
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Norikatsu Sasao, Kazuki Matsumoto, Akiko Hirao, Rumiko Hayase, Takahiro Kamikawa
  • Optical Recording Medium Utilizing Holography and Method for Manufacturing the Same and Optical Recording and Reproducing Apparatus
    Publication number: 20080080335
    Abstract: An optical recording medium has a transparent substrate having a first surface and a second surface, a recording layer provided on the first surface of the substrate and on which a light beam is incident to record information as a hologram, and a servo layer provided on the second surface of the substrate and including a phase change layer in which servo information is recorded as a phase change. The servo information is recorded as changes in the phase of the phase change layer.
    Type: Application
    Filed: September 11, 2007
    Publication date: April 3, 2008
    Inventors: Kazuki Matsumoto, Sumio Ashida, Akiko Hirao, Rumiko Hayase, Norikatsu Sasao, Takahiro Kamikawa
  • Optical recording medium and recording method thereof
    Publication number: 20070292803
    Abstract: An optical recording medium includes: a recording layer containing a photopolymerization initiator and a photopolymerization compound; and a pigment that generates light through a multiphoton absorption process.
    Type: Application
    Filed: June 8, 2007
    Publication date: December 20, 2007
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Kazuki Matsumoto, Norikatsu Sasao, Rumiko Hayase, Akiko Hirao, Takahiro Kamikawa
  • Holographic recording medium
    Publication number: 20070231744
    Abstract: A holographic recording medium includes a recording layer containing a matrix material, a photoactive monomer having an ethylenic unsaturated bond dispersed in the matrix material and a photoinitiator, and a polymerization-terminating layer formed on at least one surface of the recording layer.
    Type: Application
    Filed: March 21, 2007
    Publication date: October 4, 2007
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Norikatsu Sasao, Akiko Hirao, Rumiko Hayase, Kazuki Matsumoto, Takahiro Kamikawa
  • Holographic recording medium
    Publication number: 20070224541
    Abstract: A holographic recording medium has a recording layer, including a matrix formed of a polymer of spiroorthoester of an epoxy compound, a radical-polymerizable compound, and a photoinitiator.
    Type: Application
    Filed: March 15, 2007
    Publication date: September 27, 2007
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Rumiko Hayase, Akiko Hirao, Kazuki Matsumoto, Norikatsu Sasao, Takahiro Kamikawa