Patents by Inventor Akiyoshi Itoh

Akiyoshi Itoh 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: 8345516
    Abstract: The invention relates to a magneto-optical switching device for switching magnetization in a medium, comprising a magnetizable medium. According to the invention, a radiation system suited for imparting angular momentum to the magnetic spin system of said magnetizable medium, so as to selectively orient the magnetization of said medium. In addition, the invention relates to a method of switching a magnetizable medium, comprising providing a magnetizable medium; providing a radiation beam of a selectively chosen angular momentum; and targeting said radiation beam to said medium so as to transfer said angular momentum to a magnetic spin system of said magnetizable medium. Accordingly, spin states in magnetic materials can be manipulated using radiation of a suitable angular momentum. An effective magnetic field is generated for orienting the magnetization of the domains and can simultaneously be used to locally heat the material.
    Type: Grant
    Filed: November 7, 2011
    Date of Patent: January 1, 2013
    Assignee: Stichting Katholieke Universiteit
    Inventors: Theodorus Henricus Maria Rasing, Andrei Ivanovitch Kiriliouk, Alexey Voldermarovitsj Kimel, Claudiu Daniel Stanciu, Fredrik Hansteen, Akiyoshi Itoh, Arata Tsukamoto
  • Publication number: 20120257483
    Abstract: The invention relates to a magneto-optical switching device for switching magnetization in a medium, comprising a magnetizable medium. According to the invention, a radiation system suited for imparting angular momentum to the magnetic spin system of said magnetizable medium, so as to selectively orient the magnetization of said medium. In addition, the invention relates to a method of switching a magnetizable medium, comprising providing a magnetizable medium; providing a radiation beam of a selectively chosen angular momentum; and targeting said radiation beam to said medium so as to transfer said angular momentum to a magnetic spin system of said magnetizable medium. Accordingly, spin states in magnetic materials can be manipulated using radiation of a suitable angular momentum. An effective magnetic field is generated for orienting the magnetization of the domains and can simultaneously be used to locally heat the material.
    Type: Application
    Filed: November 7, 2011
    Publication date: October 11, 2012
    Applicants: Medical Centre
    Inventors: Theodorus Henricus Maria Rasing, Andrei Ivanovitch Kiriliouk, Alexey Voldermarovitsj Kimel, Claudiu Daniel Stanciu, Fredrik Hansteen, Akiyoshi Itoh, Arata Tsukamoto
  • Patent number: 8054713
    Abstract: The invention relates to a magneto-optical switching device for switching magnetization in a medium, comprising a magnetizable medium. According to the invention, a radiation system suited for imparting angular momentum to the magnetic spin system of said magnetizable medium, so as to selectively orient the magnetization of said medium. In addition, the invention relates to a method of switching a magnetizable medium, comprising providing a magnetizable medium; providing a radiation beam of a selectively chosen angular momentum; and targeting said radiation beam to said medium so as to transfer said angular momentum to a magnetic spin system of said magnetizable medium. Accordingly, spin states in magnetic materials can be manipulated using radiation of a suitable angular momentum. An effective magnetic field is generated for orienting the magnetization of the domains and can simultaneously be used to locally heat the material.
    Type: Grant
    Filed: May 24, 2006
    Date of Patent: November 8, 2011
    Assignee: Stichting Katholieke Universiteit
    Inventors: Theodorus Henricus Maria Rasing, Andrei Ivanovitch Kiriliouk, Alexey Voldemarovitsj Kimel, Claudiu Daniel Stanciu, Fredrik Hansteen, Akiyoshi Itoh, Arata Tsukamoto
  • Publication number: 20110058458
    Abstract: The invention relates to a magneto-optical switching device for switching magnetization in a medium, comprising a magnetizable medium. According to the invention, a radiation system suited for imparting angular momentum to the magnetic spin system of said magnetizable medium, so as to selectively orient the magnetization of said medium. In addition, the invention relates to a method of switching a magnetizable medium, comprising providing a magnetizable medium; providing a radiation beam of a selectively chosen angular momentum; and targeting said radiation beam to said medium so as to transfer said angular momentum to a magnetic spin system of said magnetizable medium. Accordingly, spin states in magnetic materials can be manipulated using radiation of a suitable angular momentum. An effective magnetic field is generated for orienting the magnetization of the domains and can simultaneously be used to locally heat the material.
    Type: Application
    Filed: May 24, 2006
    Publication date: March 10, 2011
    Applicant: Stichting Katholieke Universiteit
    Inventors: Theodorus Henricus Maria Rasing, Andrei Ivanovitch Kiriliouk, Alexey Voldermarovitsj Kimel, Claudiu Daniel Stanciu, Fredrik Hansteen, Akiyoshi Itoh, Arata Tsukamoto
  • Publication number: 20100209738
    Abstract: Disclosed is a thin film material including a substrate and an underlying layer formed on the substrate. A large number of recesses of an extremely small size are demonstrated in a surface of the underlying layer. On this surface of the underlying layer is formed a magnetic film or a non-magnetic film.
    Type: Application
    Filed: February 18, 2010
    Publication date: August 19, 2010
    Applicant: NIHON UNIVERSITY
    Inventors: Akiyoshi Itoh, Katsuji Nakagawa, Arata Tsukamoto
  • Publication number: 20090117410
    Abstract: Disclosed is a thin film material including a substrate (10) and an underlying layer (11) formed on the substrate. A large number of recesses of an extremely small size are demonstrated in a surface of the underlying layer (11). On this surface of the underlying layer is formed a magnetic film (12) or a non-magnetic film (12).
    Type: Application
    Filed: February 25, 2005
    Publication date: May 7, 2009
    Applicant: NIHON UNIVERSITY
    Inventors: Akiyoshi Itoh, Katsuji Nakagawa, Arata Tsukamoto
  • Patent number: 6707648
    Abstract: A magnetic element having an improved MR rate. The magnetic element 1 is made up of plural layered films of different compositions and exhibits a magneto-resistance effect that the magneto-resistance value is changed on application of a magnetic field. The magnetic element 1 includes a recess 11 for transmitting the current along the layering direction of the layered films. The current flows through the portion of the magnetic element 1 not having the recess 11 so as to have a component along the film layering direction A, with the result that electrons taking part in current conduction may be propagated as the electrons traverse the boundary surfaces of the plural layered films.
    Type: Grant
    Filed: May 18, 2001
    Date of Patent: March 16, 2004
    Assignee: Nih n University
    Inventors: Akiyoshi Itoh, Katsuji Nakagawa
  • Patent number: 6507197
    Abstract: An electrostatic force microscope wherein electrostatic force applied to the detector is determined through obtaining the field distribution on several different shaped detectors with the calculation of the voltage distribution near the detector with the Finite Element Method to direct the measurement of the absolute charge amount on surface under test so that one can define the differences between the analysis and the results from the parallel plate model. Of interest is how large the error in the charge detection occurs in conjunction with thickness change of dielectric materials to be tested. There is provided a detector with cantilever which has proper shape for the spatial resolution of 10&mgr; made out of nickel foil for an electrostatic force microscope and the electrostatic force which appeared on it has been calculated.
    Type: Grant
    Filed: October 30, 1998
    Date of Patent: January 14, 2003
    Assignee: Trek, Inc.
    Inventors: Akiyoshi Itoh, Katsuji Nakagawa, Manabu Tani, Toshio Uehara, Bruce T. Williams
  • Publication number: 20020030949
    Abstract: A magnetic element having an improved MR rate. The magnetic element 1 is made up of plural layered films of different compositions and exhibits a magneto-resistance effect that the magneto-resistance value is changed on application of a magnetic field. The magnetic element 1 includes a recess 11 for transmitting the current along the layering direction of the layered films. The current flows through the portion of the magnetic element 1 not having the recess 11 so as to have a component along the film layering direction A, with the result that electrons taking part in current conduction may be propagated as the electrons traverse the boundary surfaces of the plural layered films.
    Type: Application
    Filed: May 18, 2001
    Publication date: March 14, 2002
    Inventors: Akiyoshi Itoh, Katsuji Nakagawa
  • Patent number: 6337478
    Abstract: An electrostatic force microscope for measuring electrostatic force of a sample under test including a detector comprising a cantilever arm having a tip formation at one end and located so that electrostatic force is induced at the tip due to electrostatic charge on the sample under test, an optical system for transforming bending of the cantilever arm due to electrostatic force induced at the tip into an electrical signal containing a frequency component of the electrostatic force induced at the detector tip, a source for applying bias voltage to the detector, a detector for detecting the frequency component of the electrostatic force induced at the detector tip so that a measurement of electrostatic force on the sample under test can be obtained, and an electrostatic shield operatively associated with the cantilever arm. The shield is located between the cantilever arm and the sample under test, in particular in close spaced relation to the arm.
    Type: Grant
    Filed: November 5, 1999
    Date of Patent: January 8, 2002
    Assignee: Trek, Inc.
    Inventors: Toshio Uehara, Akiyoshi Itoh, Katsuji Nakagawa, Manabu Tani, Bruce T. Williams
  • Patent number: 5160783
    Abstract: An epoxy resin-impregnated glass cloth sheet having an adhesive layer provided on at least one side of the surface thereof, characterized in that (A) said epoxy resin-impregnated glass cloth sheet is formed by impregnating glass cloth with a curable epoxy resin composition and curing it, said curable epoxy resin composition comprising an epoxy resin represented by the following structural formula (I), a brominated epoxy resin and a curing agent for epoxy resin in such an amount that the content of the epoxy resin represented by the following structural formula (I) is 5 to 50% by weight based on the amount of the entire epoxy resins and the content of bromine atom is 14 to 30% by weight based on the combined amount of the entire epoxy resins and the curing agent for epoxy resin; and (B) said adhesive layer is composed of a curable epoxy resin composition comprising an epoxy resin represented by the following structural formula (I), a brominated epoxy resin, an acrylonitrile/butadiene copolymer having carboxyl
    Type: Grant
    Filed: December 19, 1990
    Date of Patent: November 3, 1992
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Yousui Nemoto, Akiyoshi Itoh, Toshimi Kohmura, Yasuhiro Horiba