Christian Friedrich Ludwig Buschmann (17 June 1805 – 1 October 1864) was a German musical instrument maker and inventor, often credited with inventing the harmonica and also the accordion.

In the first half of 1821 Johann Buschmann travelled to London, accompanied by his son Friedrich, and agreed to a £1,000 contract with a Mr. Löschmann besides taking other orders for terpodions.

He was already skilled and experienced enough at musical instrument construction to begin building terpodions and aeolins as the letters written by him and his Father make clear.

Mentioned towns or Villages while on Tour, are: Aachen, Barmen, Elberfeld (which today are part of Wuppertal), Lüdenscheid, Werben, Altena, Breckerfeld, Vörde, Langenberge, Düsseldorf, Köln, Preuß-Minden and Rinteln.

The earliest experiments with the aeoline may have taken place in 1824, when it has been claimed that Buschmann built a tuning aid named an aura, about 4 inches long and equipped with 15 reed tongues.

It is certain that they must have become aware of all kinds of modern developments in this area as they travelled through different countries, which contributed to Friedrich's further refinement of the physharmonica.

Indeed, Buschmann's father Johann wrote in a letter of 30 October 1829 that he was thinking of taking out a patent for the new instrument in Bavaria.