Patents by Inventor Tomokazu HIKIDA

Tomokazu HIKIDA 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).

  • In-vehicle acoustic system and vehicle provided with this in-vehicle acoustic system
    Patent number: 11917382
    Abstract: An in-vehicle acoustic system includes a first amplifier that outputs a first audio signal to a first mid-range speaker; a second amplifier that outputs a second audio signal to a second mid-range speaker; a third amplifier that outputs a third audio signal to a first high-range speaker and a first low-range speaker; and a fourth amplifier that outputs a fourth audio signal to a second high-range speaker and a second low-range speaker, in which the third audio signal is inputted to the first high-range speaker, the fourth audio signal is inputted to the second high-range speaker, the first audio signal is inputted to a deep-bass speaker, the third audio signal is inputted to the first low-range speaker, the fourth audio signal is inputted to the second low-range speaker.
    Type: Grant
    Filed: June 8, 2021
    Date of Patent: February 27, 2024
    Assignee: YAMAHA Corporation
    Inventors: Katsuya Hirano, Tomokazu Hikida, Takakazu Nakashima
  • IN-VEHICLE ACOUSTIC SYSTEM AND VEHICLE PROVIDED WITH THIS IN-VEHICLE ACOUSTIC SYSTEM
    Publication number: 20210392436
    Abstract: An in-vehicle acoustic system includes a first amplifier that outputs a first audio signal to a first mid-range speaker; a second amplifier that outputs a second audio signal to a second mid-range speaker; a third amplifier that outputs a third audio signal to a first high-range speaker and a first low-range speaker; and a fourth amplifier that outputs a fourth audio signal to a second high-range speaker and a second low-range speaker, in which the third audio signal is inputted to the first high-range speaker, the fourth audio signal is inputted to the second high-range speaker, the first audio signal is inputted to a deep-bass speaker, the third audio signal is inputted to the first low-range speaker, the fourth audio signal is inputted to the second low-range speaker.
    Type: Application
    Filed: June 8, 2021
    Publication date: December 16, 2021
    Inventors: Katsuya HIRANO, Tomokazu HIKIDA, Takakazu NAKASHIMA