Patents by Inventor Helen M. Green

Helen M. Green 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 traffic post with rotating delineator
    Patent number: 6068233
    Abstract: A multi-section support post for a reflective, roadway delineator that collapses upon impact at a replaceable joint. A ground stake and a sign stake are joined together with hardwood blocks that are separated with a material having a large coefficient of friction. The blocks are secured with a pivot bolt to recessed channels at the stakes. An intervening layer of tarpaper is compressed between the blocks. The sign stake collapses at the joint upon impact, such as from a snowplow. A reflective roadway delineator rotates about a pivot bolt or axle that projects from the sign stake.
    Type: Grant
    Filed: May 29, 1998
    Date of Patent: May 30, 2000
    Inventor: Helen M. Green
  • Flexible sign support
    Patent number: D423594
    Type: Grant
    Filed: November 30, 1998
    Date of Patent: April 25, 2000
    Inventor: Helen M. Green