Beginning in about 1880, Wurlitzer built a full line of upright and grand pianos. In 1914, Wurlitzer became the sole distributor of Melville Clark Pianos and in 1919 acquired the Melville Clark company. Wurlitzer continued to manufacture pianos at the Clark factory in DeKalb, Illinois under the Melville Clark name. Other brands which have been manufactured by Wurlitzer are Apollo, De Kalb, Julius Bauer, Farney, Kingston, Kurtzman, Merrium. Schaff Bros. and Underwood.
Wurlitzer excelled in piano design. They developed their "Pentagonal Soundboard", "Tone crafted hammers", and other unique innovations to help their pianos produce a richer, fuller tone. In 1935, they were one of the first manufacturers to offer the spinet piano to the mass market. This 39 inch high piano was an instant sensation. The spinet came at an opportune time, when many Americans couldn't afford a full upright or baby grand.