Patents by Inventor Ralph Francis Walker

Ralph Francis Walker 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).

  • Toothbrush
    Patent number: 7725972
    Abstract: A head for an electric toothbrush having first and second brush parts, one of which is rotary and the other is reciprocally moveable or static. Preferred forms have elastomeric oral hygiene parts, and electric toothbrush heads with novel “V” sectioned oral hygiene parts are also disclosed.
    Type: Grant
    Filed: November 18, 2002
    Date of Patent: June 1, 2010
    Assignee: GlaxoSmithKLine Consumer GmbH & Co. KG
    Inventors: Tamas Berde, Christoph Geiberger, Ralph Francis Walker