Johann Gottfried Eckard - Six Sonatas for Fortepiano
Johann Gottfried Eckard (Augsburg 1735 - Paris 1809): "His real contribution to the developpement of music lies in the fact that he was the first composer to write specifically for the pianoforte, although this instrument was still not very popular in France. In general, his music is more suited to the piano, while that of his French contemporaries is more suited to the harpsichord.
...Many composers, and not just the minor ones, borrowed from Eckard's works: Carl Philippe Emmanuel Bach, Schobert and even Wolfgang Amadeus Mozart (the Andante of the K40 Concerto). Eckard seems to have made a very lively impression on Mozart."