Patents by Inventor Toshifumi Itou

Toshifumi Itou 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).

  • Helical antenna with integral J-shaped impedance and mounting element and dual part cover
    Patent number: 5701129
    Abstract: An antenna element is composed by molding with an armor, and therefore if a slight deformation is caused by external force, the antenna characteristics are hardly changed. In particular, by the helicoid constitution of the antenna, changes of the pitch of antenna element and coil length are small, so that an antenna of excellent characteristics may be obtained. Moreover, by forming a hollow part in the armor and holding part of the helicoid part by the armor, more excellent antenna characteristics may be obtained.
    Type: Grant
    Filed: February 22, 1995
    Date of Patent: December 23, 1997
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Toshifumi Itou, Hiromitsu Shimazaki, Masaaki Arita, Shougo Horinouchi