Patents by Inventor Masaki Ishiduka

Masaki Ishiduka 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).

  • Noise absorbing structure and noise absorbing/insulating structure
    Publication number: 20050098379
    Abstract: A noise absorbing structure for effectively absorbing noise in a wide frequency range includes a first noise absorbing portion that is hollow and includes one or more first holes. The structure further includes a second noise absorbing portion that is hollow and includes one or more second holes. The total area of the one or more first holes differs from the total area of the one or more second holes.
    Type: Application
    Filed: October 7, 2004
    Publication date: May 12, 2005
    Inventors: Takahiko Sato, Yoshikazu Hirose, Akihito Yamada, Tomokazu Inoue, Akira Yamauchi, Shigeru Yabuya, Masaki Ishiduka