Cyrill Demian [SEP] place of death
Cyrill Demian
Cyrill Demian (1772–1849) was an Armenian inventor of Armenopolis origin who made his living as an organ and piano maker with his two sons, Karl and Guido, in Mariahilfer Straße No. 43 in Vienna, Austria. On May 6, 1829, Cyrill and his sons presented a new instrument to the authorities for patent - the accordion. The patent was officially granted on May 23, 1829.
Demian's accordion description.
Its appearance essentially consists of a little box with feathers of metal plates and
Carl Friedrich Uhlig
Carl Friedrich Uhlig (1789–1874) was a German luthier, known for inventing the German family of concertinas, from which are descended variants such as the bandoneón, Carlsfelder concertina, and Chemnitzer concertina.
Uhlig produced his first concertina in 1834, being dissatisfied with the early accordion keyboard developed by Cyrill Demian. Uhlig took the right-handed keyboard of Demian, and split it between the two hands, resulting in an instrument which had two separate keyboards producing individual notes. While Uhlig's development of the concertina