Patents by Inventor Steven F. Keller

Steven F. Keller 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).

  • Animal litter scoop
    Patent number: D438349
    Type: Grant
    Filed: April 28, 1999
    Date of Patent: February 27, 2001
    Inventors: Karen S. Keller, Steven F. Keller
  • Animal feeding bowl
    Patent number: D303441
    Type: Grant
    Filed: August 10, 1987
    Date of Patent: September 12, 1989
    Inventor: Steven F. Keller
  • Animal feeding bowl
    Patent number: D303853
    Type: Grant
    Filed: August 10, 1987
    Date of Patent: October 3, 1989
    Inventor: Steven F. Keller
  • Utility tray for the interior of an automobile
    Patent number: D336579
    Type: Grant
    Filed: July 11, 1990
    Date of Patent: June 22, 1993
    Inventors: Karen S. Keller, Steven F. Keller
  • Animal feeding bowl
    Patent number: D343482
    Type: Grant
    Filed: September 25, 1992
    Date of Patent: January 18, 1994
    Inventors: Steven F. Keller, Karen S. Keller
  • Cat shaped litter pan
    Patent number: D358008
    Type: Grant
    Filed: September 25, 1992
    Date of Patent: May 2, 1995
    Inventors: Steven F. Keller, Karen S. Keller
  • Animal feeding bowl
    Patent number: D361874
    Type: Grant
    Filed: July 22, 1994
    Date of Patent: August 29, 1995
    Inventors: Steven F. Keller, Karen S. Keller
  • Animal feeding bowl
    Patent number: D361875
    Type: Grant
    Filed: July 22, 1994
    Date of Patent: August 29, 1995
    Inventors: Steven F. Keller, Karen S. Keller