Patents by Inventor Roopa Pathak

Roopa Pathak 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 ink jet printing using color fortification in black regions
    Patent number: 5821957
    Abstract: A method of operating an ink jet printing mechanism to print onto a printable surface an image having a solid black portion occupying a selected region, and a color portion abutting the black portion. The method comprises printing a first plurality of color ink dots of a first color onto the selected region and after printing the color ink dots, printing black ink onto the selected region to generate the solid black portion. The color printing need not entirely be printed before any black is printed, and may be printed as a uniform, partial density pattern coextensive with the black regions.
    Type: Grant
    Filed: February 28, 1997
    Date of Patent: October 13, 1998
    Assignee: Hewlett-Packard Company
    Inventors: Thomas G. Berge, Roopa Pathak