Patents by Inventor David J. Willetts

David J. Willetts 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).

  • Patent number: 5156496
    Abstract: An earth structure has a facing formed of a plurality of laterally spaced support members. The top and bottom of each support member is connected to a stabilizing element that extends rearwardly into an earth mass. A mesh cover extends between adjacent support members. The support members include a front portion and integral lower and upper extensions that define a C-shaped strap. The mesh cover is also somewhat C-shaped as defined by a front portion and integral upper and lower rear projections which stiffen the cover against forward movement under earth pressure.
    Type: Grant
    Filed: February 7, 1991
    Date of Patent: October 20, 1992
    Assignee: Societe Civile des Brevets de Henri Vidal
    Inventors: Henri Vidal, David J. Willetts, Rodney J. H. Smith