Patents by Inventor Chizuko Yamamoto

Chizuko Yamamoto 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).

  • Graphic editing system
    Patent number: 5073957
    Abstract: A system that obtains the internal contour of a pattern without changing the ratio of the image area to the non-image area in the original image, by taking logic products between the original pattern and inverted patterns obtained by moving the original pattern in lateral and vertical directions by a small amount.
    Type: Grant
    Filed: September 9, 1988
    Date of Patent: December 17, 1991
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kunio Seto, Chizuko Yamamoto, Kiyoshi Watanabe