Jean-Baptiste Duvernoy (c. 1802 – c. 1880) was a French pianist and composer of the Romantic period. He is best known for his Elementary Studies, Op. 176, designed to improve finger co-ordination. He is also known for The School of Mechanism, Op. 120. He also wrote many other studies designed to help finger co-ordination.
You can find and download free scores of the composer: