Patents by Inventor Takao Itoga

Takao Itoga 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).

  • Synthetic resin-coated spring and method for making same
    Patent number: 4753423
    Abstract: A synthetic resin-coated spring comprising a spring body and a synthetic resin coating layer formed on the spring body. The synthetic resin coating layer contains an olefin polymer modified with an unsaturated carboxylic acid or a derivative thereof. A method for making the coated spring is also described.
    Type: Grant
    Filed: May 30, 1986
    Date of Patent: June 28, 1988
    Assignees: Nippon Petrochemicals Co., Ltd, Mitsubishi Steel Manufacture Co., Ltd.
    Inventors: Kenji Ukai, Katsumi Yano, Nobumasa Umezawa, Satoru Yamaguchi, Takao Itoga