Patents by Inventor David R. Kendall

David R. Kendall 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 estimating toner remaining in a cartridge
    Patent number: 8897658
    Abstract: A method of estimating a quantity of toner remaining in a toner cartridge includes using an adaptive term, a value of which is adjusted based on actual printer toner usage. A printer configured to produce an estimate of an amount of toner remaining in a toner cartridge installed in that printer includes a toner remaining algorithm; and an adaptive term, a value of which is adjusted based on actual printer toner usage rate. The algorithm uses the adaptive term to produce the estimate of an amount of toner remaining in the toner cartridge.
    Type: Grant
    Filed: November 30, 2006
    Date of Patent: November 25, 2014
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: David R. Kendall
  • Marking device and methods
    Patent number: 7555229
    Abstract: A portion of a replaceable component of an imaging device is selectively deformed or melted.
    Type: Grant
    Filed: September 28, 2005
    Date of Patent: June 30, 2009
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: David R. Kendall, Patrick Dougherty
  • Method and system for estimating toner remaining in a cartridge
    Publication number: 20080131146
    Abstract: A method of estimating a quantity of toner remaining in a toner cartridge includes using an adaptive term, a value of which is adjusted based on actual printer toner usage. A printer configured to produce an estimate of an amount of toner remaining in a toner cartridge installed in that printer includes a toner remaining algorithm; and an adaptive term, a value of which is adjusted based on actual printer toner usage rate. The algorithm uses the adaptive term to produce the estimate of an amount of toner remaining in the toner cartridge.
    Type: Application
    Filed: November 30, 2006
    Publication date: June 5, 2008
    Inventor: David R. Kendall
  • Method and system for diagnosing printing defects
    Publication number: 20030193684
    Abstract: A page reference system that facilitates identification of the locations of printing defects on a printed page includes a sheet of media with one or more reference points and, optionally, indicia printed thereon. The page reference system may be preprinted or printed along with another file. Accordingly, a page reference program that causes the page reference system to be printed onto a sheet is disclosed, as are systems that employ such a program. A method for using the page reference system includes printing a file onto a sheet of media onto which the page reference system is also printed, using the page reference system to identify the locations of one or more printing defects on the page, and diagnosing a printing device error responsible for each printing defect. The locations of one or more printing defects may be communicated to a product support representative, who then makes the diagnosis.
    Type: Application
    Filed: April 10, 2002
    Publication date: October 16, 2003
    Inventors: David R. Kendall, Tony Barrett