Patents by Inventor David F. Chiu

David F. Chiu 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).

  • Determining the conductivity of a liquid
    Patent number: 9304465
    Abstract: In one example, a processor readable medium has instructions thereon that, when executed by a processor, cause a system to detect a change in electrical conduction of a liquid moving at an interface between two surfaces and determine a conductivity of the liquid based on the detected change in conduction.
    Type: Grant
    Filed: May 24, 2013
    Date of Patent: April 5, 2016
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Matthew G. Lopez, David F. Chiu, David Sabo, John W. Godden, Christopher S. Tanner, Eric G. Nelson, Guang Jin Li, James Michael Pingel
  • Reducing print quality defects
    Patent number: 8991313
    Abstract: Reducing print quality defects can include printing a pattern with an offset printing device having a binary ink developer roller, determining a variation for a hue shift of the printed pattern; and varying gain in a feedback loop of a servo motor coupled to the binary ink developer roller to reduce the variation.
    Type: Grant
    Filed: January 15, 2013
    Date of Patent: March 31, 2015
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Matthew G. Lopez, Roya S. Akhavain, James M. Pingel, David F. Chiu
  • DETERMINING THE CONDUCTIVITY OF A LIQUID
    Publication number: 20140348526
    Abstract: In one example, a processor readable medium has instructions thereon that, when executed by a processor, cause a system to detect a change in electrical conduction of a liquid moving at an interface between two surfaces and determine a conductivity of the liquid based on the detected change in conduction.
    Type: Application
    Filed: May 24, 2013
    Publication date: November 27, 2014
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Matthew G. Lopez, David F. Chiu, David Sabo, John W. Godden, Christopher S. Tanner, Eric G. Nelson, Guang Jin Li, James Michael Pingel
  • REDUCING PRINT QUALITY DEFECTS
    Publication number: 20140196623
    Abstract: Reducing print quality defects can include printing a pattern with an offset printing device having a binary ink developer roller, determining a variation for a hue shift of the printed pattern; and varying gain in a feedback loop of a servo motor coupled to the binary ink developer roller to reduce the variation.
    Type: Application
    Filed: January 15, 2013
    Publication date: July 17, 2014
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Matthew G. Lopez, Roya S. Akhanvalin, James M. Pingel, David F. Chiu