Hyacinthe Elanore Klosé (1808-1880) was a French clarinet player and professor at the Conservatoire de Paris who decided to use Theobald Boehm?s flute keywork innovations as a basis for improving the clarinet. As a specialist in clarinet performance, from 1839 to 1843 he enlisted the help of Louis-August Buffet, an instrument-making technician, to construct the Boehm system clarinet. Source : Wikipedia