Patents by Inventor Douglas H. Schalk

Douglas H. Schalk 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).

  • Treat for pets
    Patent number: D588326
    Type: Grant
    Filed: December 6, 2007
    Date of Patent: March 17, 2009
    Assignee: MARS, Incorporated
    Inventors: John Fitzpatrick, Wesley E. Locke, Michael Innis, Douglas H. Schalk, Shannon Morey, Tracey Dianne Ziener
  • Pet treat
    Patent number: D591479
    Type: Grant
    Filed: February 7, 2008
    Date of Patent: May 5, 2009
    Assignee: MARS, Incorporated
    Inventors: Douglas H. Schalk, Michael Innis, Tracey Dianne Ziener
  • Pet treat
    Patent number: D600878
    Type: Grant
    Filed: February 7, 2008
    Date of Patent: September 29, 2009
    Assignee: MARS, Incorporated
    Inventors: Douglas H. Schalk, Michael Innis, Tracey Dianne Ziener
  • Pet treat
    Patent number: D603133
    Type: Grant
    Filed: February 7, 2008
    Date of Patent: November 3, 2009
    Assignee: Mars, Incorporated
    Inventors: Douglas H. Schalk, Michael Innis, Tracey Dianne Ziener
  • Treat for pets
    Patent number: D610326
    Type: Grant
    Filed: December 6, 2007
    Date of Patent: February 23, 2010
    Assignee: Mars, Incorporated
    Inventors: John Fitzpatrick, Wesley E. Locke, Michael Innis, Douglas H. Schalk, Shannon Morey, Tracey Dianne Ziener
  • Treat for pets
    Patent number: D613026
    Type: Grant
    Filed: December 6, 2007
    Date of Patent: April 6, 2010
    Assignee: Mars, Incorporated
    Inventors: John Fitzpatrick, Wesley E. Locke, Michael Innis, Douglas H. Schalk, Shannon Morey, Tracey Dianne Ziener
  • Treat for pets
    Patent number: D618879
    Type: Grant
    Filed: January 7, 2010
    Date of Patent: July 6, 2010
    Assignee: Mars, Incorporated
    Inventors: John Fitzpatrick, Wesley E. Locke, Michael Innis, Douglas H. Schalk, Shannon Morey, Tracey Dianne Ziener