Patents by Inventor Isami Katsumoto

Isami Katsumoto 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).

  • Cutting blade and method for cutting pavement in a circle
    Patent number: 6755481
    Abstract: A method for cutting pavement of an asphalt road or a concrete road in a circle for installation of a manhole, by using a cutting blade which has a pavement cutting edge serves as a tip for cutting the pavement and side edges serve as an inclined cutting surface to bore an inside of the pavement cut by the pavement cutting edge, thereby cutting the pavement in a frusto-conical shape.
    Type: Grant
    Filed: December 12, 2001
    Date of Patent: June 29, 2004
    Assignee: Sanko Corporation Ltd.
    Inventor: Isami Katsumoto
  • Cutting blade and method for cutting pavement in a circle
    Publication number: 20030107258
    Abstract: A method for cutting pavement of an asphalt road or a concrete road in a circle for installation of a manhole, by using a cutting blade which has a pavement cutting edge serves as a tip for cutting the pavement and side edges serve as an inclined cutting surface to bore an inside of the pavement cut by the pavement cutting edge, thereby cutting the pavement in a frusto-conical shape.
    Type: Application
    Filed: December 12, 2001
    Publication date: June 12, 2003
    Inventor: Isami Katsumoto