Patents by Inventor Takefumi Takenakajima

Takefumi Takenakajima 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).

  • Nonfreezing pipe
    Patent number: 5014752
    Abstract: The nonfreezing pipe with a double wall construction comprises an inner shell having openings at its opposite ends, an outer shell extending axially around the inner shell to form an annular space surrounding the inner shell, and at least one end closure member connecting between one end of the outer shell and the external wall portion of the inner shell. The annular space is evacuated.
    Type: Grant
    Filed: October 19, 1989
    Date of Patent: May 14, 1991
    Assignee: Zojirushi Vacuum Bottle Co., Ltd.
    Inventors: Takefumi Takenakajima, Kazuo Nishimura, Mamoru Fujiyama, Toshihiro Fukushima