After the virtual closure of the Chinese market[why?], Bovet continued to manufacture pocket watches, though at a much reduced rate, and would frequently offer its manufacturing services on a contract basis to other watch companies. The Landry Freres purchased Bovet in 1888 but did not invest in it.[12] In 1901, the Bovet trademark was sold at auction in Paris to Cesar and Charles Leuba, sons of Ami Leuba.[2] Jacques Ullmann and Co., another successful produce of watches for the Chinese market, purchased the Bovet brand in 1918. After Jacques Ullmann went out of business in 1932, the Bovet name was acquired by Albert and Jean Bovet, who were successful watch makers and registered several patents for chronographs, such as the mono rattrapante—a device that would pause the second hand for a reading while the mechanism continued to run.[7] The company Favre-Leuba purchased the name and manufacturing facilities from the Bovet brothers in 1948.[7]