Patents by Inventor David Wetchler

David Wetchler 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).

  • Ink-jet printing and servicing by predicting and adjusting ink-jet component performance
    Patent number: 6582044
    Abstract: Ink-jet pen drop firing elements having extended use—namely, printheads used with a plurality of replaceable reservoirs—are provided with a more accurate life span and performance gauge by monitoring energy accumulations over time and using monitored data for certain printer activity or maintenance.
    Type: Grant
    Filed: February 11, 2002
    Date of Patent: June 24, 2003
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Wen-Li Su, David Wetchler
  • Ink-jet printing and servicing by predicting and adjusting ink-jet component performance
    Publication number: 20020113831
    Abstract: Ink-jet pen drop firing elements having extended use—namely, printheads used with a plurality of replaceable reservoirs—are provided with a more accurate life span and performance gauge by monitoring energy accumulations over time and using monitored data for certain printer activity or maintenance.
    Type: Application
    Filed: February 11, 2002
    Publication date: August 22, 2002
    Inventors: Wen-Li Su, David Wetchler
  • Ink-jet printing and servicing by predicting and adjusting ink-jet component performance
    Patent number: 6354687
    Abstract: Ink-jet pen drop firing elements having extended use—namely, printheads used with a plurality of replaceable reservoirs—are provided with a more accurate life span and performance gauge by monitoring energy accumulations over time and using monitored data for certain printer activity or maintenance.
    Type: Grant
    Filed: November 24, 1999
    Date of Patent: March 12, 2002
    Assignee: Hewlett Packard Company
    Inventors: Wen-Li Su, David Wetchler