Patents by Inventor Takanari Okumura

Takanari Okumura 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).

  • Method for producing filter element
    Patent number: 5240540
    Abstract: A method for producing a filter element has three steps. In first step, a filter body including at least one first passageway and at least one second passageway or clearance extends closely and substantially parallel to the first passageway and communicate with first hole through a filter material is formed. In second step, a sheet-shaped thermoplastic adhesive is arranged on one end of the filter body, the first passageway and the second passageway or clearance are open at the one end of the filter body. In third step, the sheet-shaped thermoplastic adhesive is melted by heating to close and seal an end of the second passageway or clearance at the one end of the filter body so that the passageways do not deform.
    Type: Grant
    Filed: January 23, 1991
    Date of Patent: August 31, 1993
    Assignee: Nippondenso Co., Ltd.
    Inventors: Noriya Matsumoto, Yoshihiko Oya, Hajime Akado, Yoshihiro Taki, Kazumi Nonoyama, Takanari Okumura