Patents by Inventor Hiroshi Kagoyama

Hiroshi Kagoyama 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).

  • Ceiling-frame construction method and ceiling-frame structure for clean rooms
    Patent number: 5279090
    Abstract: In a method of constructing a ceiling frame to support a filter at the ceiling of a clean room, the method is characterized in that a number of divisional frame units are formed, each in a rectangular frame, to frame a filter unit to be installed, that those divisional frame units are positioned one after another at the ceiling of the clean room, that the ceiling frame is formed by connecting, to unify, abutting frame members of the divisional frame units, and that the divisional frame units are hanged at the ceiling with hangers applied at the abutting portions of the divisional frame units.
    Type: Grant
    Filed: March 16, 1992
    Date of Patent: January 18, 1994
    Assignees: Asahi Kogyosha Co., Ltd., Nippon Donaldson Ltd.
    Inventors: Shigehisa Yamaguchi, Yoshiaki Kashiwase, Kazutomo Isono, Hiroshi Kagoyama