Patents by Inventor Norifumi Akutagawa

Norifumi Akutagawa 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).

  • Publication number: 20140174610
    Abstract: A tubular hollow member to which torsion about a center line is applied is characterized in performing a partial heat treatment on part of a peripheral wall of the hollow member to make the hardness of an outer portion of the peripheral wall greater than the hardness before heating and greater than the hardness of an inner portion of the peripheral wall, and reduce a residual stress of the inner portion of the peripheral wall.
    Type: Application
    Filed: April 23, 2012
    Publication date: June 26, 2014
    Applicants: FUJI GIKEN CO., LTD., Y-TEC CORPORATION
    Inventors: Takeshi Edahiro, Norifumi Akutagawa, Kyotaro Yamane, Teruhisa Hiraoka, Kazumi Yasuda, Shigeaki Ando, Masaru Hashimoto, Yuichi Ando, Tetsuya Tsuruta