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examination process and given to the approved patent however great the differences in the two specifications might be. Grob and Gütter changed the focus of their claims entirely in a complete specification submitted on March 11, 1885. It dropped all mention of the piano and replaced the mechanical damping device taken from the German patent, with perpendicularly operated bars of the type exhibited by Zimmermann at the 1884 World's Fair. A second means for permitting "the various tones belonging to a harmonious chord" to be produced on a zither

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