Hammerschmidt octave patent
Originally published in 2024. Updated March 2026 German patent application Background Summery Figure 1 Figure 2 Patent claims Photos of Hammerschmidt octave vents 1961 Hammerschmidt …
french sax
Patent of a knockoff: the Jinbao bass
Originally published Dec. 2020. Completely updated March 2026. Abstract Patent Diagram Patent Background Description Claims Jinbao-made Bass Gallery Selmer Bass Sax History Questions About Knockoffs …