Patents by Inventor Aisaku Imanishi

Aisaku Imanishi 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).

  • Curve approximation method
    Patent number: 5742751
    Abstract: A method for expressing an approximate curve of an original curve by approximately expressing the original curve such as Bezier curve using matrix dots, comprises finding first and second coordinates of three consecutive dots of the approximate curve; and then finding a third coordinate of the three consecutive dots of the approximate curve on the basis of a difference between value of parameter "t" used for determining the coordinates of the first dot and that used for determining the coordinates of the second dot.
    Type: Grant
    Filed: October 31, 1995
    Date of Patent: April 21, 1998
    Assignee: Seiko Precision Inc.
    Inventors: Aisaku Imanishi, Shingo Takahashi
  • Method for representing an approximation of a curvilinear curve and constructing a curve from the approximation
    Patent number: 5581679
    Abstract: A method for approximately representing a first curve having anchor points and a control point, wherein the first curve is subdivided into a plurality of segments and an approximate curve is constructed by joining the points corresponding to the ends of the segments with straight lines. The number of segments is a prestored value.
    Type: Grant
    Filed: October 10, 1991
    Date of Patent: December 3, 1996
    Assignee: Seiko Precision Inc.
    Inventors: Shingo Takahashi, Aisaku Imanishi
  • Method and apparatus for storing and reproducing a curve
    Patent number: 5430834
    Abstract: A method for approximately representing a first curve having anchor points and a control point, wherein the first curve is subdivided into a plurality of segments and an approximate curve is constructed by joining the points corresponding to the ends of the segments with straight lines. The number of segments is a function of the difference between the lengths of lines joining the anchor points and control point, and a line joining the anchor points.
    Type: Grant
    Filed: August 9, 1993
    Date of Patent: July 4, 1995
    Assignee: Seikosha Co., Ltd.
    Inventors: Shingo Takahashi, Aisaku Imanishi
  • Curvilinear approximation method
    Patent number: 5341317
    Abstract: A method for approximately representing a first curve having anchor points and a control point, wherein the first curve is subdivided into a plurality of segments and an approximate curve is constructed by joining the points corresponding to the ends of the segments with straight lines. The number of segments is determined by sequentially subdividing the first curve until sum of the lengths of lines joining the anchor points and control points is less than a predetermined value.
    Type: Grant
    Filed: December 29, 1992
    Date of Patent: August 23, 1994
    Assignee: Seikosha Co., Ltd.
    Inventors: Shingo Takahashi, Aisaku Imanishi