Patents by Inventor Steven Frederick Keller

Steven Frederick 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 dry food scoop
    Patent number: D387957
    Type: Grant
    Filed: July 8, 1996
    Date of Patent: December 23, 1997
    Inventors: Steven Frederick Keller, Karen Sue Keller
  • Animal dry food scoop
    Patent number: D387958
    Type: Grant
    Filed: July 8, 1996
    Date of Patent: December 23, 1997
    Inventors: Steven Frederick Keller, Karen Sue Keller
  • Animal feeding bowl
    Patent number: D400315
    Type: Grant
    Filed: August 15, 1997
    Date of Patent: October 27, 1998
    Inventors: Steven Frederick Keller, Karen Sue Keller
  • Can cover
    Patent number: D417152
    Type: Grant
    Filed: August 5, 1997
    Date of Patent: November 30, 1999
    Inventors: Steven Frederick Keller, Karen Sue Keller
  • Animal can cover
    Patent number: D422502
    Type: Grant
    Filed: August 5, 1997
    Date of Patent: April 11, 2000
    Inventors: Steven Frederick Keller, Karen Sue Keller