Patents by Inventor Douglas Collier

Douglas Collier 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).

  • Utility trailers
    Patent number: 6238166
    Abstract: A utility trailer having a bed mounted on an axle which is supported by at least two wheels and adapted to be towed by a vehicle over a surface, the trailer having a bed which is capable of being selectively dumped to expel the contents thereof, wherein an anchor is disposed on chains and selectively deployable to position the chains relative to the wheels such that when the anchor is deployed, the wheels of the trailer engage the chains to halt movement of the trailer and cause rotation of the trailers bed about its axis.
    Type: Grant
    Filed: July 30, 1999
    Date of Patent: May 29, 2001
    Inventor: Douglas Collier
  • Trike hauler
    Patent number: D584195
    Type: Grant
    Filed: May 27, 2008
    Date of Patent: January 6, 2009
    Inventors: Douglas Collier, Ruby Collier