Patents by Inventor Ryuma Kawachi

Ryuma Kawachi 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).

  • Spark plug for internal combustion engine
    Patent number: 8970097
    Abstract: A spark plug for an internal combustion engine capable of ensuring sufficient gastightness of a combustion chamber and meeting demand for a reduction in diameter.
    Type: Grant
    Filed: January 21, 2010
    Date of Patent: March 3, 2015
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Yuichi Yamada, Hiroaki Kuki, Ryuma Kawachi
  • SPARK PLUG FOR INTERNAL COMBUSTION ENGINE
    Publication number: 20110273074
    Abstract: A spark plug for an internal combustion engine capable of ensuring sufficient gastightness of a combustion chamber and meeting demand for a reduction in diameter.
    Type: Application
    Filed: January 21, 2010
    Publication date: November 10, 2011
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Yuichi Yamada, Hiroaki Kuki, Ryuma Kawachi