Elmo and Rietschle can both look back on more than one hundred years of a series of impressive successes that mark industry milestones. As early as 1903, Elmo obtained the imperial patent for the world's first liquid ring vacuum pump; just three years later, Germany's first vacuum cleaner used a smaller Elmo vacuum pump. The first side channel blower was launched in 1963, revolutionizing the vacuum and pressure market. Emphasizing the design and manufacture of the highest quality machines, and providing engineering support with outstanding professionalism, has always been the hallmark of Elmo. At the turn of the millennium and after its spin-off from Siemens, Elmo merged with its former American competitor Nash Industries to establish nash_elmo.