His style resembles Dolphy's in its use of sophisticated harmonies. While the bass clarinet has been used often since Dolphy, it is customarily used by a saxophonist or clarinetist as a second or third tool; such musicians include David Murray, Marcus Miller, John Surman, John Gilmore, Bob Mintzer, John Coltrane to whom Dolphy's mother left some of Dolphy's devices including his bass clarinet, Brian Landrus, James Carter, Steve Buckley, Andy Biskin, Don Byron, Julian Siegel, Gunter Hampel, Michel Portal, and Chris Potter. Very few performers have used the instrument completely, but such performers include Berlin based bass clarinetist Rudi Mahall, and French bass clarinetists Louis Sclavis and Denis Colin. Klezmer clarinetist Giora Feidman is understood for idiosyncratic use of the bass clarinet on some klezmer and jazz tunes. There are a few contraptions that may arguably be considered the first bass clarinet. Probably the earliest is a dulcian shaped device in the Museum Carolino Augusteum in Salzburg. It is incomplete, missing a crook or mouthpiece, and appears to date from the first half of the eighteenth century. Its wide cylindrical bore and its fingering suggest it was a chalumeau or clarinet in the bass range. Four anonymous bass chalumeaux or clarinets apparently dating from the eighteenth century and having from one to six keys also look like among the earliest examples, and one in particular has been recommended thus far from before 1750. However, the authenticity of at the least one of these instruments has been puzzled. Additional designs were constructed by many other makers, adding Dumas of Sommières who called his device a "Basse guerrière" in 1807; Nicola Papalini, c.