Patents by Inventor Tomohide Maruyama

Tomohide Maruyama 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).

  • High-pressure pump unit and test method therefor
    Patent number: 5731515
    Abstract: A high-pressure pump unit allowing an oiltight test for a high-pressure piping system after assembly without damaging parts which do not have a pressure resistance construction.
    Type: Grant
    Filed: July 23, 1996
    Date of Patent: March 24, 1998
    Assignees: Mitsubishi Denki Kabushiki Kaisha, Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventors: Tsutomu Tominaga, Masayasu Miyajima, Kazuhiro Geshi, Kiyoshige Shimaoka, Mauri Ukonmaanaho, Tomohide Maruyama