Dwight P. Otis is first listed as a partner with Edward Bloomfield in The Bloomfield & Otis Piano Company in 1868. The Bloomfield & Otis Piano Company built a full line of upright pianos and square grand pianos, winning several awards and gaining recognition for building quality, well made instruments.  Bloomfield & Otis’ partnership was dissolved in 1877, and Dwight P. Otis advertised himself as “the successor and manufacturer of the Bloomfield & Otis Piano-Forte”.  After 1877, Dwight Otis continued building pianos under his own name, many of which were labeled as “D. Otis & Company”.  There is no mention of Dwight Otis being active in the piano industry after about 1880.