Patents by Inventor Stephan B. J. Koopman

Stephan B. J. Koopman 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).

  • Method of modifying the fatness of characters to be output on a raster output device
    Patent number: 5673371
    Abstract: Font data which defines the shape of each character as an outline consisting of straight and curved line segments is transformed into bitmap representations of the individual characters such that the fatness of the character in the bitmap differs from that of the original font character by a predetermined fattening distance (f) by determining a modified outline on the basis of the font data and the fattening distance (f), and then compiling the bitmap representation by filling the modified outline with discrete pixels.
    Type: Grant
    Filed: March 19, 1996
    Date of Patent: September 30, 1997
    Assignee: Oce-Nederland B.V.
    Inventors: Stephan B. J. Koopman, Abraham Nico Abbekerk
  • Bifurcating background colors between word and non-word space for improving text readability
    Patent number: 5404432
    Abstract: Texts of small fonts are made easier to read by displaying or printing background pixels in the spaces between characters within words with an adjusted grey level or color, which is a mix product of the grey level or color of the characters and that of the background.
    Type: Grant
    Filed: July 14, 1993
    Date of Patent: April 4, 1995
    Assignee: OCE-Nederland, B.V.
    Inventors: Stephan B. J. Koopman, Fredericus R. J. Smeijers