- C.F. Theodor Steinweg receives the United States patent “Des. 10,740”, to “grand piano case design”, “Des.10,742”, to “upright piano case design”, and #205,696, to “repetition hammer-butt to produce continuous escapement for upright pianos”.
- William Steinway’s diary: “I look at Organ factory for a few minutes, Organs are very near completion”.