Electricity: motive power systems – Motor-reversing – Armature or primary circuit control
Reexamination Certificate
2007-10-02
2007-10-02
Donovan, Lincoln (Department: 2837)
Electricity: motive power systems
Motor-reversing
Armature or primary circuit control
C084S184000, C084S187000, C084S192000, C084S265000, C084S275000, C084S291000
Reexamination Certificate
active
11092268
ABSTRACT:
A soundboard for a hollow-body stringed instrument made of layers of carbon-fiber and resin material surrounding a core of one or more layers of constant-thickness plywood, veneer (thinly sliced wood) or paper. Additional shaped layers are provided to produce a desired pattern of stiffness in the soundboard. The soundboard may be tuned by attaching additional masses to a surface of the soundboard. A method of making and tuning the soundboard of the invention is provided.
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Brown & Michaels PC
Donovan Lincoln
Horn Robert W.
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