Cincinnati, Ohio, 1860–1876.
Succeeded Matthias Schwab firm; partnership of Johann H. Koehnken, Gallus Grimm and Frederick P. Denghausen in Cincinnati, Ohio, 1860-1876; Denghausen left firm, 1864; succeeded by Koehnken & Grimm.
Staff: Sebastian Christel; H. B. Eckelmann; James Fink; Conrad Forischon; H. Freulke; John Glunz; Gebhardt Grimm; Ignatz; Christian Jacob; Moser; Engelbert Schafer; John Scheinhof; August Siedle; Christoph Stever; Aaron Wertheimer.
There are 5 entries in the database that describe organs by Koehnken & Co.
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