Patents by Inventor Barbara A. Sivells

Barbara A. Sivells 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).

  • Sprayer dolly
    Patent number: 6279838
    Abstract: This invention relates generally to a lightweight dolly for transporting spray equipment including a container of liquid, battery power pack and optional charger unit, hose reel, and spray gun.
    Type: Grant
    Filed: January 13, 2000
    Date of Patent: August 28, 2001
    Assignee: Empire Spraying Systems, Inc.
    Inventors: Michael D. Sivells, Barbara A. Sivells
  • Sprayer dolly
    Patent number: D462493
    Type: Grant
    Filed: January 31, 2001
    Date of Patent: September 3, 2002
    Assignee: Empire Spraying Systems, Inc.
    Inventors: Michael D. Sivells, Barbara A. Sivells
  • Sprayer dolly
    Patent number: D424771
    Type: Grant
    Filed: January 15, 1999
    Date of Patent: May 9, 2000
    Assignee: Empire Systems, Inc.
    Inventors: Michael D. Sivells, Barbara A. Sivells