Patents by Inventor Alan Maddaford

Alan Maddaford 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).

  • Injection molding process for forming coated molded parts
    Publication number: 20080230949
    Abstract: A method for molding color-coated plastic parts is disclosed. The method includes a technique for applying a color layer to the surface of sections of a mold when the mold is closed, and distributing a substrate into a cavity defined by the mold sections whereby the last point of fill for the substrate is located at an entry location of a color material.
    Type: Application
    Filed: March 23, 2007
    Publication date: September 25, 2008
    Inventors: Paul Razgunas, Alan Maddaford
  • Automatic trailer hitch lock
    Patent number: 5573263
    Abstract: A self-latching trailer hitch for securing and releasing a hitch ball attached to a towing vehicle. The hitch maintains itself in a ball receiving position and when placed over the hitch ball, automatically locks into a ball securement position without the need for manual manipulation of a locking device. The hitch is provided with a release handle so that the hitch may be quickly and easily released from the hitch ball.
    Type: Grant
    Filed: July 7, 1994
    Date of Patent: November 12, 1996
    Assignee: DICO, Inc.
    Inventors: Martin L. Denny, Alan Maddaford