Patents by Inventor James W. Leffingwell

James W. Leffingwell 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).

  • Unitary shock-absorbing polymeric pad for artificial turf
    Patent number: 4505960
    Abstract: Unitary, shock-absorbing polymeric pads having a vertically asymmetric compression resistance which are useful for recreational surfaces, for instance under artificial turf.
    Type: Grant
    Filed: August 12, 1983
    Date of Patent: March 19, 1985
    Assignee: Monsanto Company
    Inventor: James W. Leffingwell