Patents by Inventor Koichiro Tokuda

Koichiro Tokuda 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).

  • Joint for different-diameter pipes and method of connecting different-diameter pipes
    Patent number: 5887909
    Abstract: A joint which is a cylindrical body having an inner circumferential surface, a diameter of which is larger than any of outer diameters of two pipes to be connected, the cylindrical body being provided with an annular projecting strip portion formed in an approximately axially intermediate portion so as to project radially inward, first and second cylindrical portions respectively disposed on opposite sides of the annular projecting strip, annular projecting portions projecting radially outward so as to form annular space portions in approximately intermediate portions of the first and second cylindrical portions respectively, and through holes formed respectively in the annular projecting portions for injecting a foamable and curable liquid agent.
    Type: Grant
    Filed: June 6, 1996
    Date of Patent: March 30, 1999
    Assignee: Totaku Industries, Inc.
    Inventor: Koichiro Tokuda