Patents
Patents

GebrM for JK large MOP key touches

Julius Keilwerth saxophones are known for many things: their huge sound; big bells; accurate intonation; sturdy build; longevity; and big MOP key touches. But something …

Hammerschmidt octave patent

German patent application Background Summery Figure 1 Figure 2 Patent claims Photos of Hammerschmidt octave vents 1961 Hammerschmidt catalogue page & description Other companies’ inventions: …