Patents by Inventor Donald W. F. Campbell

Donald W. F. Campbell 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).

  • Radio pager holster assembly
    Patent number: 5551079
    Abstract: A holster assembly for retaining a radio pager or data receiver including a clip fixed to the assembly having a first position for resiliently clamping the holster assembly to an article of clothing and another stable open position for supporting the assembly on a surface as a stand for the pager or receiver, a vibrator alert apparatus and a battery connected thereto contained wholly within a housing formed by the holster assembly.
    Type: Grant
    Filed: April 29, 1993
    Date of Patent: August 27, 1996
    Assignee: Silcom Research Limited
    Inventors: Gyles Panther, J. Peter Williams, Donald W. F. Campbell