1815-1894

French clockmaker.
Established in Switzerland.

1842

Invented the first pendant crown winder (without a key), Rewarded by a Gold medal at the Universal Exhibition in Paris, in 1844, patented in 1845.

1845

With Antoine de Norbert Patek and Vincent Gostowski, founded Patek & Co, future Patek Philippe.

1863

Invented the sliding brace (end of the free mainspring).