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  • ...nificant development was an improved piston valve invented in 1838 or 1839 by brass instrument maker François Périnet of Paris. His design featured fas ...k in 1827. He invented amongst others what's called the Mainzer valve. The cornet below has levers that actuate the rotary valves.
    115 KB (18,081 words) - 22:20, 24 January 2024