Who invented the low A baritone saxophone?

The low A Baritone Saxophone was developed by the American instrument maker Adolphe Sax in the mid-19th century. Sax, who invented the Saxophone family in 1846, created various models, including the baritone saxophone, which initially played in B♭. The low A version emerged later as a response to the musical demands of players seeking a broader range in the instrument.