Patents by Inventor Royce M. Calvert

Royce M. Calvert 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).

  • Stile and rail clamp
    Patent number: 4281826
    Abstract: A stile clamp provided with a first clamp manually operable to hold a rail against a base, and a second clamp operable in a direction perpendicular to that of the first clamp to force a stile against the held rail. The first clamp and the base have mutually perpendicular surfaces, which facilitate proper orientation of the rail and the stile before operation of the clamps fixes their positions.
    Type: Grant
    Filed: December 14, 1979
    Date of Patent: August 4, 1981
    Inventor: Royce M. Calvert