The Akkordzither was invented by Karl August Gütter of Markneukirchen, Germany. In 1882 a U.S. patent for the autoharp (a modified version of the Akkordzither) was granted to Charles F. Zimmerman, a German emigré. His patent was later acquired by Alfred Dolge (1848–1922), a New York City piano-equipment manufacturer. Dolge…
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