Patent ID: 8183447

Claim:
A truss system, in a stringed musical instrument having a fretboard/fingerboard located on a front side of a neck, for providing adjustable tension independently in each of two different longitudinal portions of said truss system for counteracting concave curvature in each of two corresponding longitudinal portions of the neck, comprising: first and second truss portions of said truss system, located in at least one channel configured generally in a rear region of the neck opposite the front side and oriented generally parallel with the neck; fixed truss fastening means made and arranged to strongly secure a central region of said truss system to a designated fastening location in a generally central region of the neck, in a manner particularly secure against longitudinal displacement, said truss portions extending therefrom to respective truss ends located in opposite end regions of the neck; and dual adjustable truss tensioning means, located at respective outer end regions of said first and second truss portions, made and arranged to enable manual application and adjustment of tension in each truss portion independently so as to apply and adjust a compressive force to each neck portion that acts in opposition to concave curvature independently in each of two in-line regions of the neck.