Following Antoni Patek’s death in 1877 and his son’s retreat from the business, the company was managed by one of Jean Adrien Philippe’s brothers-in-law, Joseph Antoine Bénassy-Philippe. He was responsible for running the manufacture for some ten years until it was taken over by the youngest son of J. A. Philippe, Joseph Emile Philippe. In the meantime, the prestigious watchmaking brand had its logo – the Calatrava cross – patented.
In 1901 the manufacture became a joint-stock company and its name Patek Philippe & Cie changed to Ancienne Manufacture d’horlogerie Patek, Philippe & Cie, SA. Back then the company had a registered capital of 1.6 million Swiss francs. Its board of directors had seven members, including Alfred G. Stein who was entrusted with managing the company’s American branch in New York.
Until 1932 the company kept growing, did well on all markets, and dominated the US market. Patek, Philippe & Cie, SA manufactured complicated timepieces called grand complications that were fitted with sound mechanisms such as a minute repeater and a grande and petite sonnerie. Among its important clients was factory owner James Ward Packard and banker Henry Graves. When the Great Depression hit in 1929 even a company as strong as the Genevan horological star was negatively impacted. The company searched for a new owner.