Patents by Inventor Eizo Ohno

Eizo Ohno 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).

  • Thermoelectric material
    Patent number: 5352299
    Abstract: A thermoelectric material is provided which consists of an oxide with a perovskite structure, wherein the oxide is of the formula (Ln.sub.1-x A.sub.x).sub.2 MO.sub.4 with 0.01.ltoreq.x.ltoreq.0.05, where Ln is a rare earth element, A is an alkali earth metal element, and M is a transition metal element. The thermoelectric material is particularly useful for Peltier cooling elements to produce low temperatures below room temperature.
    Type: Grant
    Filed: July 2, 1992
    Date of Patent: October 4, 1994
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yoshikazu Yoshimoto, Eizo Ohno, Masaru Yoshida, Shigeo Nakajima, Shoei Kataoka
  • Superconductive logic device
    Patent number: 5298485
    Abstract: A logic circuit device includes a superconductive body formed of a ceramic superconductive material. The ceramic superconductive material has random grain boundaries which act as weak couplings. The ceramic superconductive material also has a magneto-resistive property. There is at least one conductor arranged near the ceramic superconductive body in order to exert a magnetic field on the ceramic superconductive body. The ceramic superconductive body changes its resistance in response to the magnetic field generated by the conductor. The ceramic superconductive body can be used as part of a logic circuit.
    Type: Grant
    Filed: November 30, 1992
    Date of Patent: March 29, 1994
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Shoei Kataoka, Hiroya Sato, Shuhei Tsuchimoto, Hideo Nojima, Shinji Toyoyama, Masayoshi Koba, Nobuo Hashizume, Eizo Ohno, Susumu Saitoh
  • Superconductive magneto-resistive device comprising laminated superconductive ceramic films
    Patent number: 5140300
    Abstract: A superconductive magneto-resistive device includes superconductive ceramic films having a magneto-resistive effect. In the superconductive magneto-resistive device, the superconductive ceramic films are laminated one by one, and the adjacent superconductive ceramic films are insulated by each electrical insulation film, respectively, except for one portion of each of the adjacent superconductive ceramic films, resulting in that the superconductive ceramic films are connected in series. Furthermore, a pair of electrodes is arranged on the upper-most and lower-most superconductive ceramic films.
    Type: Grant
    Filed: August 8, 1991
    Date of Patent: August 18, 1992
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Eizo Ohno, Hideo Nojima, Masaya Nagata, Shuhei Tsuchimoto
  • Apparatus for observing a superconductive phenomenon in a superconductor
    Patent number: 5126655
    Abstract: An apparatus for observing a superconductive phenomenon is disclosed. In the apparatus, a cooling unit cools a superconductor having a threshold temperature at which the superconductor changes from the normal conductive phase to the superconductive phase, and a magnetic field is applied thereto. A current is supplied to the superconductor, and there are clearly observed a phenomenon on which an electric resistance thereof becomes zero at a threshold temperature thereof, a phenomenon on which the superconductor changes from the normal conductive phase to the superconductive phase at a threshold current to be supplied thereto, and a phenomenon on which the super conductor changes from the normal conductive phase to the superconductive phase at a threshold magnetic field to be applied thereto.
    Type: Grant
    Filed: October 17, 1990
    Date of Patent: June 30, 1992
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Ryusuke Kita, Hidetaka Shintaku, Shuhei Tsuchimoto, Shoei Kataoka, Eizo Ohno, Masaya Nagata
  • Apparatus for observing a superconductive phenomenon in a superconductor
    Patent number: 5065087
    Abstract: An apparatus for observing a superconductive phenomenon is disclosed. In the apparatus, a cooling unit cools a superconductor having a threshold temperature at which the superconductor changes from the normal conductive phase to the superconductive phase, and a magnetic field is applied thereto. A current is supplied to the superconductor, and there are clearly observed a phenomenon on which an electric resistance thereof becomes zero at a threshold temperature thereof, a phenomenon on which the superconductor changes from the normal conductive phase to the superconductive phase at a threshold current to be supplied thereto, and a phenomenon on which the superconductor changes from the normal conductive phase to the superconductive phase at a threshold magnetic field to be applied thereto.
    Type: Grant
    Filed: October 3, 1989
    Date of Patent: November 12, 1991
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Ryusuke Kita, Hidetaka Shintaku, Shuhei Tsuchimoto, Shoei Kataoka, Eizo Ohno, Masaya Nagata