Patents Assigned to Hiroshi Hashimoto
  • Grinding tool
    Patent number: 6142860
    Abstract: A grinding tool of the present invention is configured by having grinding surface that comes into direct contact with the surface of the object to be ground. Multiple small protuberances which include diamonds and other abrasive materials are formed on the grinding surface. Surface area of the small protuberances and the distance between the small protuberances are set such that the grinding resistance was maintained at an approximate constant value after a substantially constant grinding resistance value was reached.
    Type: Grant
    Filed: December 27, 1996
    Date of Patent: November 7, 2000
    Assignees: Hiroshi Hashimoto, Tokyo Diamond Tools Mfg. Co. Ltd.
    Inventor: Hiroshi Hashimoto