Patents by Inventor Akira Tabata

Akira Tabata 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: 12122241
    Abstract: A vehicle driving apparatus includes: an engine; a first rotary electric machine; first and second output shafts; a power distribution device for distributing a power between the first and second output shafts; and a control device for controlling an electric-power generation torque of a second rotary electric machine such that a power distribution ratio between the first and second output shafts becomes a target distribution ratio, and controlling a total torque of the engine and the first rotary electric machine such that a requested drive torque is obtained. The control device executes an electric-power consuming control to supply at least a part of a generated electric power generated by the second rotary electric machine, to the first rotary electric machine without via a power storage device, and to drive the first rotary electric machine, such that an operation state of the engine is brought close to a fuel-economy optimum state.
    Type: Grant
    Filed: May 26, 2022
    Date of Patent: October 22, 2024
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi Tabata, Koichi Okuda, Koji Takaira, Yuuki Makino, Akinori Homan, Yosuke Akiyama, Akira Ijichi, Kunihiko Usui
  • Publication number: 20060002954
    Abstract: The object of the present invention is to provide a composition which is capable of going into erythrocyte or into cells, trapping not only oxygen radicals but also hydroxyl radicals, and preventing or improving various symptoms including hypertension, excessive sensitivity to cold, diabetes, Parkinson's disease, menstrual disorder, brain infarct, atopic dermatitis, hay fever, articular rheumatism, autonomic ataxia, and the like by oral intake. The present invention relates to an invention of a composition trapping radicals in organism comprising the steps of: roasting soy bean, wheat germ, adlay, husked rice germ, and rice bran, which are materials at a temperature of 50 to 150° C.
    Type: Application
    Filed: June 20, 2005
    Publication date: January 5, 2006
    Inventors: Akira Tabata, Takumi Nakamura
  • Patent number: 4824794
    Abstract: A bipolar transistor having self-aligned base and emitter regions is fabricated in a silicon layer which is epitaxially grown on a substrate so as to fill up a cavity formed through a polysilicon layer deposited on the substrate. The polysilicon layer is doped with impurities for creating an extrinsic base region in the epitaxially grown silicon layer and is insulated from the emitter electrode by a dielectric layer formed thereon. The dielectric layer can be provided by selectively oxidizing the polysilicon layer. Thus, the step formed at the emitter electrode is small and equal to the thickness of the dielectric layer, about 3000 .ANG., for example, thereby eliminating the faulty step coverage in the prior art self-aligned bipolar transistor usually having the step as large as 1 micron.
    Type: Grant
    Filed: March 14, 1988
    Date of Patent: April 25, 1989
    Assignee: Fujitsu Limited
    Inventors: Akira Tabata, Motoshu Miyajima, Kazushi Kawaguchi
  • Patent number: 4579625
    Abstract: A method of producing a complementary semiconductor device having p-type islands and n-type islands in a dielectric isolation structure, including removing a projecting portion of a polycrystalline silicon layer, which is formed at the same time as the formation of an epitaxial silicon layer for one of two types of islands, so as to obtain an almost smooth exposed surface. The smooth surface contributes to the formation of a good masking pattern on the epitaxial silicon layer by a photoetching method, so that mesa portions for islands having exact dimensions are formed at predetermined positions.
    Type: Grant
    Filed: September 19, 1984
    Date of Patent: April 1, 1986
    Assignee: Fujitsu Limited
    Inventors: Akira Tabata, Motoshu Miyajima, Yoshifumi Kikuchi
  • Patent number: 4567646
    Abstract: A method for fabricating a wafer for a dielectric isolation (DI) integrated circuit device is provided, wherein the substrate of the wafer, comprises portions of polycrystalline silicon positioned beneath regions for electrical elements, namely, "islands", and portions of single crystal silicon are positioned in other areas of the wafer such as scribing regions, peripheral regions and contact regions. The single crystal portions of the substrate are grown during its fabricating steps by exposing surfaces of an original substrate of single crystal silicon, before the deposition of silicon onto the original substrate, by removing a dielectric isolation layer over the predetermined regions to be exposed. The single crystal silicon portions of the wafer provide various advantages for subsequent mechanical processing of the wafer such as shaping and rounding of the peripheral region and the scribing of the wafer into dice.
    Type: Grant
    Filed: November 30, 1984
    Date of Patent: February 4, 1986
    Assignee: Fujitsu Limited
    Inventors: Tamotsu Ishikawa, Hirokazu Tanaka, Akira Tabata
  • Patent number: 4509249
    Abstract: A method for fabricating an isolation region in a semiconductor substrate that produces neither a "bird's beak" nor a "bird's head". A smooth substrate surface is provided, which is preferable for multi-layered wiring. The packing density of devices in a bipolar IC circuit can be increased. A sharp-edged isolation groove having a U-shaped cross-section is made by reactive ion etching. The inner surface of the isolation groove is coated by an insulating film. Then the groove is buried with polycrystalline semiconductor material. The polycrystalline material which is deposited on the surface of the substrate is etched off. At the same time the polycrystalline material in the groove is also etched to a specific depth from the surface. An insulating film is then deposited so as to again fill the groove. Then the substrate surface is polished or etched to provide a flat surface.
    Type: Grant
    Filed: September 23, 1983
    Date of Patent: April 9, 1985
    Assignee: Fujitsu Ltd.
    Inventors: Hiroshi Goto, Akira Tabata
  • Patent number: RE34400
    Abstract: A method for fabricating an isolation region in a semiconductor substrate that produces neither a "bird's beak" nor a "bird's head". A smooth substrate surface is provided, which is preferable for multi-layered wiring. The packing density of devices in a bipolar IC circuit can be increased. A sharp-edged isolation groove having a U-shaped cross-section is made by reactive ion etching. The inner surface of the isolation groove is coated by an insulating film. Then the groove is buried with polycrystalline semiconductor material. The polycrystalline material which is deposited on the surface of the substrate is etched off. At the same time the polycrystalline material in the groove is also etched to a specific depth from the surface. An insulating film is then deposited so as to again fill the groove. Then the substrate surface is polished or etched to provide a flat surface.
    Type: Grant
    Filed: September 14, 1990
    Date of Patent: October 5, 1993
    Assignee: Fujitsu Limited
    Inventors: Hiroshi Goto, Akira Tabata