Montgolfier brothers
Other Montgolfier inventions

Both brothers invented a process to manufacture transparent paper similar to vellum, imitating the technique of the English, followed by the papermakers Johannot and Réveillon. In 1796, Joseph Michel Montgolfier invented the first self-acting hydraulic ram, a water pump to raise water for his paper mill at Voiron. In 1772, the British clockmaker John Whitehurst had invented its precursor, the "pulsation engine". In 1797, Montgolfier's friend Matthew Boulton took out a British patent on his behalf.

In 1816, Joseph Michel's sons obtained a British patent for an improved version of the pump.
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