Patents by Inventor Kunitoshi Katagiri

Kunitoshi Katagiri 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).

  • Ultrasonic injection mold for an optical disk
    Patent number: 6464485
    Abstract: An ultrasonic injection mold for an optical disk includes a movable die and a fixed die; a disk molding cavity formed between the movable die and the fixed die; a stamper positioned at the bottom of the cavity for forming a pit on a surface of the disk; and an ultrasonic generation device provided on the movable die or fixed die for applying ultrasonic waves to the cavity in performing infection molding. One or more slits are formed on the movable die and the fixed die in the direction which crosses the radial direction of the cavity. The ultrasonic injection mold minimizes the amplitude of the ultrasonic transmitted in the radial direction of the cavity.
    Type: Grant
    Filed: June 23, 2000
    Date of Patent: October 15, 2002
    Assignees: Pioneer Corporation, Pioneer Video Corporation, Idemitsu Petrochemical Co., Ltd.
    Inventors: Tetsuya Iida, Noriyoshi Shida, Keiji Suga, Kenichi Ishiguro, Yasunobu Higashika, Atsushi Sato, Kunitoshi Katagiri