Anton Walter
Born in Neuhausen auf den Fildern in Germany, Walter moved to Vienna in 1780. In 1790 he obtained the status of Imperial Royal Chamber Organ Builder and Instrument Maker. His firm was employing about 20 craftsmen and was labeled "Anton Walter und Sohn" ("and son"). Walter improved the Viennese piano mechanic design that was created by Johann Andreas Stein in Augsburg. The most famous composers of those times had pianos from Walter, among them were Ludwig van Beethoven, Joseph Haydn and Wolfgang Amadeus Mozart. Last bought Walter's piano in 1782 and was using it in an important phase of his career. Mozart's own piano that was built by Walter survived till the XXI century and now is kept in Salzburg.