Patents by Inventor Tomonobu Nakayama

Tomonobu Nakayama 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).

  • Publication number: 20040089882
    Abstract: This invention provides a method for constructing bridge including fine wires or point contacts producing a quanitized inter-electrode conductance, and provides a method for easily controlling the conductance of this bridge. Further, it aims to provide an electronic element using conductance control due to the bridge, fine wire or point contact formed between the electrodes.
    Type: Application
    Filed: February 27, 2003
    Publication date: May 13, 2004
    Inventors: Masakazu Aono, Kazuya Terabe, Tsuyoshi Hasegawa, Tomonobu Nakayama
  • Publication number: 20030174042
    Abstract: There are provided a point contact array, in which a plurality of point contacts are arranged, each point contact electrically and reversibly controlling conductance between electrodes and being applicable to an arithmetic circuit, a logic circuit, and a memory device, a NOT circuit, and an electronic circuit using the same.
    Type: Application
    Filed: March 7, 2003
    Publication date: September 18, 2003
    Inventors: Masakazu Aono, Tsuyoshi Hasegawa, Kazuya Terabe, Tomonobu Nakayama
  • Patent number: 6608306
    Abstract: The invention provides a probe for use with a scanning tunneling microscope, a method of treating the probe, and a method of fabricating a nano-structure, which facilitates formation of a continuous nano-structure. The probe for the scanning tunneling microscope is formed of an Ag2S crystal having both ion conductivity and electron conductivity. Voltage and tunnel current are applied between the probe and a substrate in order to move movable Ag ions to thereby grow, on the tip end of the probe, a projection (mini chip) composed of Ag ions or Ag atoms. The polarity of the applied voltage is reversed after the growth of the projection in order to return the Ag ions or Ag atoms constituting the grown projection (mini chip) into the Ag2S crystal to thereby contract the projection. Thus, the probe can have a projection composed of Ag ions or Ag atoms and a regulated shape.
    Type: Grant
    Filed: January 8, 2001
    Date of Patent: August 19, 2003
    Assignees: Japan Science and Technology Corporation, Riken
    Inventors: Masakazu Aono, Tomonobu Nakayama, Kazuya Terabe
  • Publication number: 20020178800
    Abstract: An apparatus is provided for evaluating electrical characteristics by bringing a plurality of metal probes in contact with a minute area with low contact resistance.
    Type: Application
    Filed: June 19, 2002
    Publication date: December 5, 2002
    Inventors: Tsuyoshi Hasegawa, Masakazu Aono, Tomonobu Nakayama, Taichi Okuda, Kazuya Terabe, Hirofumi Tanaka
  • Patent number: 5418512
    Abstract: This invention provides a superconducting magnetic shield and a magnetic shielding apparatus including the same, thereby accurately measuring an extremely weak magnetic field such an magnetoencephalographic waves by reducing the influence of magnetic field of the earth or magnetic noises.
    Type: Grant
    Filed: December 9, 1992
    Date of Patent: May 23, 1995
    Assignees: Mitsui Kinzoku Kogyo Kabushiki Shisha, Rikagaku Kenkyusho
    Inventors: Hiroshi Ohta, Masakazu Aono, Kazuhiko Kato, Kazutomo Hoshino, Hidefusa Takahara, Tomonobu Nakayama, Eiichi Sudoh
  • Patent number: 5187327
    Abstract: This invention provides a superconducting magnetic shield and a magnetic shielding apparatus including the same, thereby accurately measuring an extremely weak magnetic field such as magnetoencephalographic waves by reducing the influence of magnetic field of the earth or magnetic noises.
    Type: Grant
    Filed: September 26, 1990
    Date of Patent: February 16, 1993
    Assignees: Mitsui Kinzoku Kogyo Kabushiki Kaisha, Rikagaku Kenkyusho
    Inventors: Hiroshi Ohta, Masakazu Aono, Kazuhiko Kato, Kazutomo Hoshino, Hidefusa Takahara, Tomonobu Nakayama, Eiichi Sudoh