Patents by Inventor Rob Patrick Chohan

Rob Patrick Chohan 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).

  • Interactive visual card-selection process for mitigating light-area banding in a pagewide array
    Patent number: 7815275
    Abstract: Preferably, test-patterns print on separate, multiple print-medium cards, each including a ramp with colors graded along a certain direction—and, superimposed on the ramp, a candidate add-on colorant. Ramps preferably are printed in so-called “customer colors”, common in snapshots and particularly snapshot regions that include sky. Positions or amounts of the candidate add-on colorant canvass a likely range of values that optimize camouflaging or suppression of a banding artifact (due to seams in the pagewide array) that is extended along the same certain direction. For each seam and each “customer color” used, an operator holds up several cards for comparison, selecting the best one to three. Operators thus can evaluate candidate colorant patterns in context of many different tones of the sky and other customer colors.
    Type: Grant
    Filed: July 27, 2007
    Date of Patent: October 19, 2010
    Inventors: Shilin Guo, Guo Li, Rob Patrick Chohan, Julie Huynh
  • Interactive visual card-selection process for mitigating light-area banding in a pagewide array
    Publication number: 20090028585
    Abstract: Preferably, test-patterns print on separate, multiple print-medium cards, each including a ramp with colors graded along a certain direction—and, superimposed on the ramp, a candidate add-on colorant. Ramps preferably are printed in so-called “customer colors”, common in snapshots and particularly snapshot regions that include sky. Positions or amounts of the candidate add-on colorant canvass a likely range of values that optimize camouflaging or suppression of a banding artifact (due to seams in the pagewide array) that is extended along the same certain direction. For each seam and each “customer color” used, an operator holds up several cards for comparison, selecting the best one to three. Operators thus can evaluate candidate colorant patterns in context of many different tones of the sky and other customer colors.
    Type: Application
    Filed: July 27, 2007
    Publication date: January 29, 2009
    Inventors: Shilin Guo, Guo Li, Rob Patrick Chohan, Julie Huynh
  • Floor printer
    Patent number: 6719467
    Abstract: A floor printer has a printing device and a fiducial nozzle along a bottom of a housing. The fiducial nozzle deposits a marks on a medium. The printing device forms an image on the medium.
    Type: Grant
    Filed: April 30, 2001
    Date of Patent: April 13, 2004
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Jeffery S Hess, Rob Patrick Chohan, Wiatt Kettle
  • Floor Printer
    Publication number: 20020158955
    Abstract: A floor printer has a printing device and a fiducial nozzle along a bottom of a housing. The fiducial nozzle deposits a marks on a medium. The printing device forms an image on the medium.
    Type: Application
    Filed: April 30, 2001
    Publication date: October 31, 2002
    Inventors: Jeffery S. Hess, Rob Patrick Chohan, Wiatt Kettle