Patents by Inventor L. John Twiford

L. John Twiford 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).

  • Method for altering tonal characteristics of a stringed musical instrument
    Patent number: 4238986
    Abstract: The bridge has a pair of elongate feet forming the contact between the bridge and the table of the instrument. The feet extend at right angles to the bridge in direction substantially parallel to the grain of the wood from which the table is formed.Methods utilizing an improved bridge for a stringed musical instrument for improving and/or altering the tonal qualities of stringed instruments.
    Type: Grant
    Filed: February 27, 1979
    Date of Patent: December 16, 1980
    Inventor: L. John Twiford