Patents by Inventor Shigeyoshi Ishida

Shigeyoshi Ishida 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).

  • Patent number: 4090418
    Abstract: A device for reforming and grinding the blade of a knife to be sharpened comprising a supporting rod, a grinding plate having a plurality of concentric triangular projections at the both sides thereof, and guide disks arranged at the both sides of said grinding plate. A clearance into which the blade of a knife is inserted is provided between said grinding plate and guide disk.
    Type: Grant
    Filed: December 2, 1976
    Date of Patent: May 23, 1978
    Inventor: Shigeyoshi Ishida