Issued to Hans Hohner in 1906, this patent covers several models issued by Hohner under the names Chimewood and Chorosa. These included a 10-hole Richter harp, an octave tuned Knittlinger model and a Viennese tremolo. The key feature of all of them was a wooden chamber designed to enhance the tone of the instrument.
This design was also covered by German Patent 173667 issued the same year, which featured slightly different drawings:
Here is a page from a 1912 Hohner catalog showing various forms of the Chimewood:
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