Patents by Inventor Charles B. Powell, Jr.

Charles B. Powell, Jr. 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).

  • Patent number: 4583440
    Abstract: A capo for a guitar and five string banjo that is selectively mounted along the length of the guitar or five string banjo neck for retaining all of the strings of the guitar or four of the five strings of a five string banjo in abutting relation to the frets of the fretboard for the purpose of uniformly changing the pitch of the strings without the need for retuning the strings. The capo consists of a clamp frame that mounts a rubber strip for clamping against the strings and two integral handles that are grasped using either hand for operation and a coiled tension spring to provide the clamping force.
    Type: Grant
    Filed: February 8, 1985
    Date of Patent: April 22, 1986
    Inventor: Charles B. Powell, Jr.