Patents by Inventor Chris Wykoff

Chris Wykoff 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 and system for reducing banding effects in a printing system
    Patent number: 6629751
    Abstract: An image reproduction system with requisite technology to reduce or eliminate altogether banding effects is provided. The system includes an input tray for storing print media, an output area for holding printed media and an inkjet pen or printhead for printing information on the print media. In a preferred embodiment, the reproduction system is inkjet printer whose pen scans and ejects ink on the print media with a non-uniform dot pitch. This non-uniformity is achieved by adding visual noise in a known and predictable fashion to the uniform dot pitch.
    Type: Grant
    Filed: June 28, 2001
    Date of Patent: October 7, 2003
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Matthew D. Giere, William Edward Bland, Chris Wykoff
  • Printing system that utilizes print masks with resolutions that are non-integral multiples of each other
    Patent number: 6547354
    Abstract: A method of operating a printing system having a media advance direction and a transverse direction that is perpendicular to the media advance direction and a first plurality of ink drop generators and a second plurality of ink drop generators by moving the first plurality of ink drop generators along the transverse direction while ejecting first ink droplets onto the media in a dot grid pattern having a first resolution in the transverse direction and moving the second plurality of ink drop generators along the transverse direction while ejecting second ink droplets onto the media in a second dot grid pattern having a second resolution in the transverse direction. The first and second resolutions being non-integer multiples of each other.
    Type: Grant
    Filed: July 28, 2000
    Date of Patent: April 15, 2003
    Assignee: Hewlett-Packard Company
    Inventors: Ronald A. Askeland, Chris Wykoff, William S. Osborne
  • Method and system for reducing banding effects in a printing system
    Publication number: 20030001910
    Abstract: An image reproduction system with requisite technology to reduce or eliminate altogether banding effects is provided. The system includes an input tray for storing print media, an output area for holding printed media and an inkjet pen or printhead for printing information on the print media. In a preferred embodiment, the reproduction system is inkjet printer whose pen scans and ejects ink on the print media with a non-uniform dot pitch. This non-uniformity is achieved by adding visual noise in a known and predictable fashion to the uniform dot pitch.
    Type: Application
    Filed: June 28, 2001
    Publication date: January 2, 2003
    Inventors: Matthew D. Giere, William Edward Bland, Chris Wykoff