Patents by Inventor Yasushi Doi

Yasushi Doi 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).

  • Image extraction mask
    Patent number: 4868884
    Abstract: By comparing the density values of the pixels of a specific color separation image of an original comprising an objective image stored as data in an image memory with a threshold, determining a border line between the area of which density value is higher than the threshold and the area of which density value is lower than the threshold as the conclusive outline of the objective image, and by applying to both the areas distinct data respectively, an image extraction mask data is obtained to be stored into a mask memory.
    Type: Grant
    Filed: December 21, 1987
    Date of Patent: September 19, 1989
    Assignee: Dainippon Screen Mfg. Co., Ltd.
    Inventors: Ryuichi Miyazaki, Yosuke Kakihara, Yasushi Doi, Hirokazu Takizawa
  • Needle selection mechanism for an automatic knitting machine
    Patent number: 4222247
    Abstract: A needle selection mechanism for an automatic knitting machine, comprising at least two selector levers mounted to a carriage which is adapted to move along a needle retainer in which are disposed a plurality of selectors for knitting needles, wherein each selector is individually engageable with one of the selector levers, and different selectors are engageable with different selector levers, and wherein the selector levers set the selectors to either "knit" or "welt" positions.
    Type: Grant
    Filed: December 14, 1978
    Date of Patent: September 16, 1980
    Assignee: Dainippon Screen Seizo Kabushiki Kaisha
    Inventors: Takeji Hashimoto, Yoshio Nagao, Yasushi Doi