Patents by Inventor John Crigler

John Crigler 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).

  • Protective tendon tensioning anchor assemblies
    Patent number: 4918887
    Abstract: A protective tendon tensioning anchor assembly comprising an anchor plate, a sealing cup and a resilient sealing ring for providing corrosion protection for exposed portions of a tendon secured in the tendon tensioning anchor assembly.
    Type: Grant
    Filed: October 14, 1987
    Date of Patent: April 24, 1990
    Assignee: VSL Corporation
    Inventors: Edgar A. Davis, Richard L. Watts, John Crigler