Actually Sax was pretty effective in court, at least at first - despite his claim being absurd. The Perinet valve design was patented in 1838 when Sax was 24 and concurrent with his first patent - for a woodwind instrument. That same year, GA Besson used Perinet valves in a cornet (or something resembling one). How Sax manipulated the court to issue a finding against Besson in 1858 is mind boggling, but that is why Besson fled to England (to avoid paying) leaving his wife in France to start a "new" Besson company while he continued the old one in England. Sax must have been an amazing marketing guy (BS artist) or "Branding" expert, and simply hijacked brass instruments somehow getting people to accept the name Saxhorn like we do "Kleenex". He didn't actually build valved brass until maybe 1842, 4 years later, so both Perinet and Besson should have had basis to block Sax in court, but somehow he bizarrely prevailed and the term Saxhorn is still recognized as "the first real brass instruments" it seems.