Patents by Inventor Atsushu Iijima

Atsushu Iijima 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).

  • Golf club head
    Patent number: 8182362
    Abstract: A weight piece (14) containing 15 wt. % or greater of iron and tungsten, and having a specific gravity of 9 or larger, larger than a material of a head body (10) made of steel or pure iron, is joined to the head body (10) by welding.
    Type: Grant
    Filed: December 16, 2002
    Date of Patent: May 22, 2012
    Assignee: Fu Sheng Industrial Co., Ltd.
    Inventors: Harunobu Kusumoto, Takeshi Kasai, Atsushu Iijima, Hitoshi Tamura