Patents by Inventor Taro Kitagawa

Taro 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).

  • Methods of testing a connection between speakers and a power amplifier and devices therefor
    Patent number: 9041412
    Abstract: The present disclosure provides methods and devices for testing a connection between speakers and a power amplifier. The disclosed methods and devices solve a problem that, upon a connection test for a power amplifier which has a booster power source, when a midpoint potential of the power amplifier and the voltage of the speaker connection terminal are compared, and it is determined that short-circuiting occurs on a ground side when the potential of the speaker connection terminal is lower than the midpoint potential, a wrong test is conducted if a midpoint potential is higher than a battery voltage.
    Type: Grant
    Filed: March 27, 2012
    Date of Patent: May 26, 2015
    Assignee: Alpine Electronics, Inc.
    Inventors: Minoru Matsuyama, Taro Kitagawa
  • Methods of Testing a Connection Between Speakers and a Power Amplifier and Devices Therefor
    Publication number: 20120286798
    Abstract: The present disclosure provides methods and devices for testing a connection between speakers and a power amplifier. The disclosed methods and devices solve a problem that, upon a connection test for a power amplifier which has a booster power source, when a midpoint potential of the power amplifier and the voltage of the speaker connection terminal are compared, and it is determined that short-circuiting occurs on a ground side when the potential of the speaker connection terminal is lower than the midpoint potential, a wrong test is conducted if a midpoint potential is higher than a battery voltage.
    Type: Application
    Filed: March 27, 2012
    Publication date: November 15, 2012
    Inventors: Minoru Matsuyama, Taro Kitagawa