Patents by Inventor Isamu UMEGAKI

Isamu UMEGAKI 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).

  • Speaker system and enclosure structure of speaker system
    Patent number: 10764662
    Abstract: To provide an enclosure structure having relatively high rigidity to a speaker system mounted on a vehicle, and to improve frequency characteristics of sound pressure. The speaker system includes: a hollow framework member extending in a front-back direction of a vehicle; and a speaker unit installed such that an internal space of the framework member is usable as a back cavity. The framework member has a partition member at at least one end of the internal space, and spatial path lengths from the speaker unit to both longitudinal ends of the internal space are substantially the same.
    Type: Grant
    Filed: March 20, 2019
    Date of Patent: September 1, 2020
    Assignees: DENSO TEN Limited, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masashi Nakamura, Masahito Isayama, Takashi Moriki, Kazuhiko Hamada, Isamu Umegaki, Shunsuke Kobayashi, Koji Sagata
  • SPEAKER SYSTEM AND ENCLOSURE STRUCTURE OF SPEAKER SYSTEM
    Publication number: 20190313173
    Abstract: To provide an enclosure structure having relatively high rigidity to a speaker system mounted on a vehicle, and to improve frequency characteristics of sound pressure. The speaker system includes: a hollow framework member extending in a front-back direction of a vehicle; and a speaker unit installed such that an internal space of the framework member is usable as a back cavity. The framework member has a partition member at at least one end of the internal space, and spatial path lengths from the speaker unit to both longitudinal ends of the internal space are substantially the same.
    Type: Application
    Filed: March 20, 2019
    Publication date: October 10, 2019
    Applicants: DENSO TEN Limited, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masashi NAKAMURA, Masahito ISAYAMA, Takashi MORIKI, Kazuhiko HAMADA, Isamu UMEGAKI, Shunsuke KOBAYASHI, Koji SAGATA