Patents by Inventor Yoshimichi Numata

Yoshimichi Numata 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).

  • Patent number: 7684839
    Abstract: A magnesium diboride superconducting wire has excellent conduction property and stability. The superconductive connection of the magnesium diboride superconducting wire covered with a superconducting coating layer and a same or different kind of another superconducting wire are connected in a metal tube filled with a solder by way of the superconductive coating layer.
    Type: Grant
    Filed: December 13, 2005
    Date of Patent: March 23, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Masaya Takahashi, Yoshimichi Numata, Michiya Okada
  • Publication number: 20060240991
    Abstract: A magnesium diboride superconducting wire has excellent conduction property and stability. The superconductive connection of the magnesium diboride superconducting wire covered with a superconducting coating layer and a same or different kind of another superconducting wire are connected in a metal tube filled with a solder by way of the superconductive coating layer.
    Type: Application
    Filed: December 13, 2005
    Publication date: October 26, 2006
    Inventors: Masaya Takahashi, Yoshimichi Numata, Michiya Okada
  • Patent number: 6930313
    Abstract: A high reliability emission source is constructed to secure the ohmic contact between a carbon nanotube and an electrically conductive base material, so as to ensure sufficient joining strength, and to provide for easy beam shaft adjustment. An electron microscope for realizing high resolution, high brightness, a reduction in sample damage due to a reduction in acceleration voltage, a reduction in cost and compactness, and an electron beam drawing device for realizing high definition, high efficiency, a reduction in cost and compactness in comparison with the conventional device, is achieved by using this high reliability emission source. In the emission source, the carbon nanotube is attached to the tip central portion of the electrically conductive base material through an electrically conductive joining material or an organic material by carbonization-processing the organic material by heat treatment, or by diffusive joining.
    Type: Grant
    Filed: August 8, 2003
    Date of Patent: August 16, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Tadashi Fujieda, Kishio Hidaka, Mitsuo Hayashibara, Shuichi Suzuki, Yoshimichi Numata, Toshiaki Horiuchi
  • Patent number: 6833550
    Abstract: The disclosure is concerned with an electron microscope comprising a casing for encasing an assembly and a display disposed to the casing. The assembly comprises a vacuum container, a vacuum pump for evacuating the vacuum container, an electron emitter disposed at the upper position of the vacuum vessel, a sample chamber disposed at the lower position of the vacuum container and capable of projecting from the casing and a detector for detecting an electron beam emitted from a sample placed in the sample chamber.
    Type: Grant
    Filed: August 20, 2003
    Date of Patent: December 21, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Mitsuo Hayashibara, Kishio Hidaka, Toshiaki Horiuchi, Tadashi Fujieda, Yoshimichi Numata, Shuuichi Suzuki
  • Publication number: 20040157449
    Abstract: An electrode device for an electric field emission electron source suitable for duty drive having an element size of 50 &mgr;m or smaller and an electrode device fabricating method. A glass film used as catalyst of forming carbon nanotubes is formed on a substrate to form metal catalyst at nano meter level and control dispersion. Carbon nanotubes are dispersively formed on the metal catalyst and a metal coat is formed on the surface of carbon nanotubes to improve electric pulse response characteristics.
    Type: Application
    Filed: February 6, 2004
    Publication date: August 12, 2004
    Inventors: Kishio Hidaka, Yoshimichi Numata, Mitsuo Hayashibara, Mitsutoshi Honda, Takashi Naitou, Hideyo Kodama
  • Publication number: 20040144922
    Abstract: The disclosure is concerned with an electron microscope comprising a casing for encasing an assembly and a display disposed to the casing. The assembly comprises a vacuum container, a vacuum pump for evacuating the vacuum container, an electron emitter disposed at the upper position of the vacuum vessel, a sample chamber disposed at the lower position of the vacuum container and capable of projecting from the casing and a detector for detecting an electron beam emitted from a sample placed in the sample chamber.
    Type: Application
    Filed: August 20, 2003
    Publication date: July 29, 2004
    Inventors: Mitsuo Hayashibara, Kishio Hidaka, Toshiaki Horiuchi, Tadashi Fujieda, Yoshimichi Numata, Shuuichi Suzuki
  • Patent number: 6734087
    Abstract: An electrode device for an electric field emission electron source suitable for duty drive having an element size of 50 &mgr;m or smaller and an electrode device fabricating method. A glass film used as catalyst of forming carbon nanotubes is formed on a substrate to form metal catalyst at nano meter level and control dispersion. Carbon nanotubes are dispersively formed on the metal catalyst and a metal coat is formed on the surface of carbon nanotubes to improve electric pulse response characteristics.
    Type: Grant
    Filed: November 6, 2002
    Date of Patent: May 11, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Kishio Hidaka, Yoshimichi Numata, Mitsuo Hayashibara, Mitsutoshi Honda, Takashi Naitou, Hideyo Komada
  • Publication number: 20040026629
    Abstract: The invention provides a high reliability emission source able to secure the ohmic contact of a carbon nanotube and an electrically conductive base material, and having sufficient joining strength and easily making a beam shaft adjustment. The invention also provides an electron microscope for realizing high resolution, high brightness, a reduction in sample damage due to a reduction in acceleration voltage, a reduction in cost and compactness, and an electron beam drawing device for realizing high definition, high efficiency, a reduction in cost and compactness in comparison with the conventional device kind by using this high reliability emission source. Therefore, in the emission source, the carbon nanotube is attached to the tip central portion of the electrically conductive base material through an electrically conductive joining material or an organic material.
    Type: Application
    Filed: August 8, 2003
    Publication date: February 12, 2004
    Inventors: Tadashi Fujieda, Kishio Hidaka, Mitsuo Hayashibara, Shuichi Suzuki, Yoshimichi Numata, Toshiaki Horiuchi
  • Publication number: 20030087511
    Abstract: An electrode device for an electric field emission electron source suitable for duty drive having an element size of 50 &mgr;m or smaller and an electrode device fabricating method. A glass film used as catalyst of forming carbon nanotubes is formed on a substrate to form metal catalyst at nano meter level and control dispersion. Carbon nanotubes are dispersively formed on the metal catalyst and a metal coat is formed on the surface of carbon nanotubes to improve electric pulse response characteristics.
    Type: Application
    Filed: November 6, 2002
    Publication date: May 8, 2003
    Inventors: Kishio Hidaka, Yoshimichi Numata, Mitsuo Hayashibara, Mitsutoshi Honda, Takashi Naitou, Hideyo Kodama
  • Patent number: 5572000
    Abstract: A distributor for use in an electronic ignition system, in which a rotating electrode is formed of a metallic material, and a dielectric material is provided connected thereto, contacting through a very small area at a portion apart from the sparking surface of the metallic member. The dielectric constant of the dielectric member is larger than that of a rotating body holding the rotating electrode.
    Type: Grant
    Filed: February 10, 1994
    Date of Patent: November 5, 1996
    Assignee: Hitachi, Ltd.
    Inventors: Yoshimichi Numata, Hiromitsu Nagae, Michitaka Yumino