Patents by Inventor Yoshinori Katsumata

Yoshinori Katsumata 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).

  • Pressing method for frame plate to be mounted with disk drive motor
    Patent number: 6389869
    Abstract: In a card-type magnetic recording device (1), a motor (10) for driving a magnetic disk stored therein is mounted in a recess (9) that is formed in a frame plate (8). In order to form the recess (9) in the frame plate (8), backward extrusion molding is effected by means of a die (35) having a slope (39) and a punch (37) having a slope (40). A region between the slope (39) and the slope (40) is crushed by means of the die (35) and the punch (37) that relatively move up and down, and extends backward as well as forward with respect to the moving direction of the punch.
    Type: Grant
    Filed: October 19, 2000
    Date of Patent: May 21, 2002
    Assignees: Citizen Watch Co., Ltd., Kabushiki Kaisha Katsumata Hatsujyo Seisakusho
    Inventors: Maki Wakita, Katsutoshi Mukaijima, Shoji Takahashi, Yoshinori Katsumata
  • Hair fashion accessory
    Patent number: 6192893
    Abstract: A challenge of the present invention is to provide a hair fashion accessory which is not removed easily from hair once it is fastened to the hair. For solution to the challenge, in the hair fashion accessory comprising a coil spring made of a wire material for a spring to catch hair in spaces between winds of the wire material for holding the hair, the coil spring is formed in a polygonal column with helical side edges.
    Type: Grant
    Filed: July 14, 2000
    Date of Patent: February 27, 2001
    Assignee: Katsumata Spring Co., Ltd.
    Inventor: Yoshinori Katsumata