Patents by Inventor Kiyohisa HATTORI

Kiyohisa HATTORI 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).

  • ELECTROACOUSTIC CONVERSION DEVICE
    Publication number: 20230129491
    Abstract: An electroacoustic conversion device includes a vibration plate, an inner voice coil attached to the vibration plate, an outer voice coil attached to the vibration plate outside the inner voice coil to surround the inner voice coil, a magnet, a yoke, and the frame which holds the vibration plate and the yoke. The magnet includes a wiring portion which is in a form of a through hole or a notch in which inner signal lines for the inner voice coil are provided.
    Type: Application
    Filed: October 17, 2022
    Publication date: April 27, 2023
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Satoshi ITOH, Mitsukazu KUZE, Shinya KAGAWA, Kiyohisa HATTORI