Patent ID: 7498497

Claim:
A body structure of a stringed instrument, comprising: a wood core material; one decorative wood board attached to one side of the core material, in which the decorate board has hardness that is greater than that of the wood core material, and a second wood board having substantially the same properties as said one decorative wood board attached to a back side of said wood core material, a bridge threadably coupled to said body structure from a back side of said body structure by means of a through hole in said one decorative wood board, wood core and second wood board of said body structure and a bolt passing through said through hole from said back side of said body structure and threadably coupled to said bridge, and wherein the wood core material is formed using a single material whose specific gravity is lower than that of the one decorative wood board and said second wood board; and said bridge is threadably coupled to said body by first screw means treaded through said bridge and into said through hole, an internally threaded bushing provided in said through hole with said first screw means treaded there into and a second screw means inserted into said through hole from a back side of said body structure and threaded into said bushing.