1825, Brodmann Patent
Joseph Brodmann patented the three-ply soundboard, which served to facilitate increased string tension.
Joseph Brodmann retires, selling his workshop to Ignaz Bösendorfer (1794 – 1859), a former apprentice, establishing Bösendorfer Piano Company to preserve the original inspiration and character of the Viennese instrument.
After the death of Érard, his nephew Pierre Érard took over the company.
Knabe piano company (originally known as Knabe & Gaehle) established by German born Wilhem (William) Knabe (1803 – 1864) along with Henry Gaehle in Baltimore, Maryland.
- "Knabe History." Knabe Pianos. Samick Music Corporation, n.d. Web. 17 Sept. 2015.
1842, Hardman Peck
Hardman Peck piano company, established by Liverpudlian Hugh Hardman (b. 1815) in New York, arguably developed the first good commercial grade upright piano.
1843, Chickering Patent
Chickering received patent for complete cast-iron grand frame.
- Kuntz, Ed. "A Short History of the Chickering Piano Co." Calgary Community Network Assoc. Calgary Community Network Assoc., n.d. Web. 17 Sept. 2015.
Blüthner piano company established by Julius Blüthner (1824 – 1910) in Leipzig, Germany.
C. Bechstein piano company established by Carl Bechstein (1826 – 1900) in Berlin, Germany.
Steinway & Sons established by Henry E. Steinway (1797 – 1871) and his sons in New York City.
1854, Mason & Hamlin
Mason & Hamlin established by Henry Mason (1831 – 1890) and Emmons Hamlin (1821 – 1885) in Boston, Massachusetts. Their first instrument was the “organ harmonium.” Hamlin was a mechanic & inventor who invented a process of free-reed voicing which transformed the reed organ industry.