Patents by Inventor Allen S. Shepherd, III

Allen S. Shepherd, III 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).

  • Combination drainage system and radon gas venting system for a structure foundation
    Patent number: 5740638
    Abstract: A combination drainage system and radon gas venting system for a structure foundation as disclosed which utilizes solid rubber particle fill as a free draining and venting medium.
    Type: Grant
    Filed: February 21, 1997
    Date of Patent: April 21, 1998
    Assignee: Shepherd Excavating, Inc.
    Inventor: Allen S. Shepherd, III