Ernst Zacharias

Ernst Zacharias (born 21 June 1924) is a German musician and engineer. In the 1950s and 1960s, he invented various electro-mechanical musical instruments for the German musical instrument manufacturer Hohner, including the Cembalet, the Clavinet, the Guitaret, and the Pianet. The Claviola, a modernisation of the sheng and the Harmonetta, a mouth-blown concertina-keyboarded instrument, were also invented by Zacharias. DEPATIS lists 90 patents by Ernst Zacharias for Hohner, including plastic recorders and watch and clock mechanisms.

...
Wikipedia