Johann Heinrich Wilhelm Grenser (5 March 1764 – 12 December 1813) was a German musical instrument maker.
From 1779 to 1786 he was apprenticed to his uncle, August Grenser, a Dresden instrument maker, and after his apprenticeship he continued to work in August's shop, taking it over himself in 1796.[1] Heinrich Grenser invented an early form of bass clarinet in 1793,[2] and may have been the inventor of the alto clarinet, beginning production in 1808.[3]
^Young, Phillip T. (May 1978). "Inventory of Instruments: J. H. Eichentopf, Poerschman, Sattler, A. and H. Grenser, Grundmann". The Galpin Society Journal. 31. The Galpin Society Journal, Vol. 31: 100–134. doi:10.2307/841193. JSTOR841193.