Patents by Inventor Takumi Kitagawa

Takumi Kitagawa 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: 6969923
    Abstract: An engine start system includes a starter starting an engine, a starter drive relay controlling the starter and an engine ECU connected to a starter switch for controlling on/off of the starter drive relay based on a predetermined start condition. The engine start system further includes a normally closed relay connected to the starter switch, the engine ECU and the starter for establishing a de-energized state between the starter switch and the starter upon energization from the engine ECU to an exciting coil and establishing an energized state between the starter switch and the starter upon de-energization of the exciting coil. The engine ECU includes a circuit energizing the exciting coil of the normally closed relay upon turn-on of the engine ECU.
    Type: Grant
    Filed: February 20, 2003
    Date of Patent: November 29, 2005
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Takumi Kitagawa
  • Publication number: 20040104579
    Abstract: An engine start system includes a starter (600) starting an engine, a starter drive relay (300) controlling the starter (600) and an engine ECU (100) connected to a starter switch (200) for controlling on/off of the starter drive relay (300) based on a predetermined start condition. The engine start system further includes a normally closed relay (400) connected to the starter switch (200), the engine ECU (100) and the starter (600) for establishing a de-energized state between the starter switch (200) and the starter (600) upon energization from the engine ECU (100) to an exciting coil and establishing an energized state between the starter switch (200) and the starter (600) upon de-energization of the exciting coil. The engine ECU (100) includes a circuit energizing the exciting coil of the normally closed relay (400) upon turn-on of the engine ECU (100).
    Type: Application
    Filed: November 18, 2003
    Publication date: June 3, 2004
    Inventor: Takumi Kitagawa
  • Patent number: 6465563
    Abstract: A coating composition particularly suitable for coating poly(phenylene oxide) comprises aqueous medium-dispersed particles of: A) between about 30 and about 35 wt %, of a first styrene-acrylic polymer formed of monomers, between about 50 and about 80 mole % of which monomers are styrene or substituted styrene monomers, between about 2 and about 15 mole percent of which monomers are acrylonitrile, and between about 18 and about 48 mole percent of which are acrylic monomers, said first styrene-acrylic polymer having an acid number of about 15 or below; B) between about 30 and 35 wt %, of an acrylic second polymer formed of monomers, at least about 90 mole percent of which monomers are acrylate monomers, balance other &agr;, &bgr;-ethylenically unsaturated monomers, said acrylic second polymer having an acid number between 0 and about 25; and C) between about 30 and about 40 wt % of an acrylic-urethane hybrid polymer.
    Type: Grant
    Filed: September 22, 2000
    Date of Patent: October 15, 2002
    Assignee: Rohm and Haas Company
    Inventors: Nobuhiro Mori, Michael Leonard, Blake Burich, Michael Jackson, Robert Kooy, Manabu Ozawa, Toru Tanaka, Takumi Kitagawa, Ikuo Asato, Jeff Makarewicz