Patents by Inventor Tsatsuya Saito

Tsatsuya Saito 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).

  • Cylindrical magnetic recording medium and method for manufacturing the same
    Patent number: 6791797
    Abstract: A magnetic recording medium includes a cylindrical substrate and pores embedded with a magnetic substance that are provided on the outer circumferential surface of the cylindrical substrate and aligned in tracks that are in parallel with one another along the center axis of the cylindrical substrate. The tracks have as their center the center axis of the cylindrical substrate, and form circular orbits defined by planes perpendicular to the center axis. Alternatively, the tracks are in a spiral orbit or in spiral orbits whose center is the center axis of the cylindrical substrate. The pores at intersections of vertical and horizontal rows are aligned in quadrilaterals such as squares, rectangles or rhombi.
    Type: Grant
    Filed: March 5, 2003
    Date of Patent: September 14, 2004
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tsatsuya Saito, Tohru Den