Patents by Inventor Kenneth E. Roberts

Kenneth E. Roberts 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).

  • Guy crane jib tip prop
    Patent number: 3933250
    Abstract: To increase the working strength and stability of a guy jib crane, a prop supports the jib tip. The jib is articulated so that it can be folded for traveling of the crane, and the prop can be stowed alongside a folded section of the jib during travel of the crane.
    Type: Grant
    Filed: November 1, 1974
    Date of Patent: January 20, 1976
    Inventors: Alvin M. Roberts, Kenneth E. Roberts