Patents by Inventor Yoshiyuki Matsushima

Yoshiyuki Matsushima 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).

  • Porous filter element with undulations
    Patent number: 4894158
    Abstract: A porous filter element for filtering a liquid, the filter element having a plurality of seamless filter element units that are made of stainless steel or titanium powder wherein ranges of particle diameters, sintering densities, and nominal pore sizes define a final shape which is formed with undulations to provide bed surfaces for an auxiliary filtering agent.
    Type: Grant
    Filed: July 31, 1987
    Date of Patent: January 16, 1990
    Assignee: Kirin Beer Kabushiki Kaisha
    Inventors: Tadashi Morita, Kazuhiro Nomura, Yoshiyuki Matsushima