Patents by Inventor Phillip J. Burkinshaw

Phillip J. Burkinshaw 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).

  • Collapsible stage
    Patent number: 4580776
    Abstract: Collapsible staging formed from modules each having end frames and side frames, the side frames incorporating vertical hinges allowing the side frames to be collapsed in a concertina fashion as the end frames are moved toward one another, so that the folded framework lies in a flat "sandwich" configuration. The frames support a platform which may be detached, or alternatively hinged to one end frame and also folded in a concertina fashion. Alternative configurations provide folding stairs and ramps.
    Type: Grant
    Filed: August 19, 1983
    Date of Patent: April 8, 1986
    Inventor: Phillip J. Burkinshaw
  • Extrusion
    Patent number: D283446
    Type: Grant
    Filed: July 8, 1983
    Date of Patent: April 15, 1986
    Inventor: Phillip J. Burkinshaw
  • Extrusion
    Patent number: D283549
    Type: Grant
    Filed: July 8, 1983
    Date of Patent: April 22, 1986
    Inventor: Phillip J. Burkinshaw