Patents by Inventor Robert C. Herrin

Robert C. Herrin 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).

  • Anti-terrorist road block
    Patent number: 6997638
    Abstract: A road block having an extensible bollard that is manually or electronically actuated by a powerful spring force for slow extension, and by both the spring and a power lift for rapid extension.
    Type: Grant
    Filed: August 5, 2003
    Date of Patent: February 14, 2006
    Assignee: Perimeter Defense Technologies LPO
    Inventors: Clifford J. Hensley, Robert C. Herrin, David L. Stice, Robert L. Sims