Patents by Inventor Alyssa Ann Birtles

Alyssa Ann Birtles 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).

  • Exhaust conduit
    Patent number: D563302
    Type: Grant
    Filed: March 9, 2007
    Date of Patent: March 4, 2008
    Assignee: Bissell Homecare, Inc.
    Inventors: Douglas J. Medema, Alyssa Ann Birtles
  • Sprayer
    Patent number: D591919
    Type: Grant
    Filed: March 9, 2007
    Date of Patent: May 5, 2009
    Assignee: BISSELL Homecare, Inc.
    Inventors: Douglas J. Medema, Alyssa Ann Birtles