Patents by Inventor Kazuyoshi Oishi

Kazuyoshi Oishi 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).

  • Cutter head and rock excavator
    Publication number: 20030230925
    Abstract: The present invention relates to a cutter head and a rock excavator provided therewith utilized for excavating base rocks in free section to proceed excavating a mine gallery, a tunnel, a shaft and the like.
    Type: Application
    Filed: June 18, 2003
    Publication date: December 18, 2003
    Applicant: OISHI INTERNATIONAL SYSCOM CO., LTD
    Inventor: Kazuyoshi Oishi