Patents by Inventor John Sydney Charles Darby

John Sydney Charles Darby 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).

  • ADVANCED GUARD RAIL
    Publication number: 20130126270
    Abstract: An advanced guard rail connectable between two respective end frames to create an access tower, the advanced guard rail comprising: a frame; and a hook provided at each respective corner of the frame, each hook configured to receive a rung of a respective end frame therein, wherein the distances between the upper hook centres and the lower hook centres are dissimilar, to add additional stiffness to the access tower in use.
    Type: Application
    Filed: November 17, 2011
    Publication date: May 23, 2013
    Applicant: YOUNGMAN GROUP LIMITED
    Inventor: John Sydney Charles Darby
  • Guard rail
    Patent number: D657888
    Type: Grant
    Filed: November 17, 2011
    Date of Patent: April 17, 2012
    Assignee: Youngman Group Limited
    Inventor: John Sydney Charles Darby