Patents by Inventor Ryuichi Kojo

Ryuichi Kojo 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 member and method of manufacturing the same
    Patent number: 6733875
    Abstract: A porous member for pneumatic bearings or the like provides a controlled gas flow rate across a porous ceramic body, which can be readily achieved by a facilitated treatment. The porous body has its outer surface portion covered by a surface layer comprised of fine silica particles which are impregnated in the porous body. The surface layer is subjected to a heat treatment to form restricted passages which are in communication with, and smaller in size than pores within the porous body.
    Type: Grant
    Filed: November 9, 1994
    Date of Patent: May 11, 2004
    Assignee: Toto, Ltd.
    Inventors: Yukio Takano, Ryuichi Kojo, Takayuki Hirota