The gas vacuum engine was eventually to become a commercial success. In 1853-1854 Eugenio Barsanti and Felice Matteucci invented and patented the Barsanti-Matteucci engine which was a different form of gas vacuum engine. Developed further by Otto &amp; Langen in Germany, it was put into worldwide production (outside Germany) by Crossley of Manchester between 1867 and 1877. Examples of this form of engine can be seen working at the Anson Engine Museum. This success arose from a demonstration of the engine at the World Fair in Paris in 1867, where it was shown to be far more efficient than the current production gas engine of Lenoir which was driven by the pressure resulting from burning the gas, rather than a vacuum. The success of the vacuum engine was however short lived after the creation of engines that compressed the gas/air mixture before igniting it.