Patents by Inventor Robert William Sperry

Robert William Sperry 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).

  • Patent number: 5661507
    Abstract: Inkjet-printed images (characters or graphics) have an image-quality asymmetry, correlated with the direction of pen scanning. The invention exploits this asymmetry to improve apparent overall quality by forcing the less-perfect side of each image element to become, and be hidden in, the element interior. To achieve this effect, part of each element is printed during pen scanning in one direction and part during scanning in an opposite direction. Neither scan prints the trailing edge--that is, the edge the pen reaches last, when moving in a given direction. Instead each scan prints only the leading edge--plus the interior or part of the interior, if the image is wide enough that its interior forms an analytically separate portion.
    Type: Grant
    Filed: February 10, 1994
    Date of Patent: August 26, 1997
    Assignee: Hewlett-Packard Company
    Inventor: Robert William Sperry