Claims that its bladeless fans produce a more constant airflow than traditional fans were made by a company that employs more than how many people worldwide?
Bladeless fan A bladeless fan (sometimes called an air multiplier) blows air from a ring with no external blades. Its blades are hidden in its base. The first concept was created by Toshiba in 1981. Dyson claims that its bladeless fans (U.S. Patent  ) produce a more constant airflow than traditional fans.
Viessmann The Viessmann Group is an international heating systems manufacturer headquartered in Allendorf (Eder), Germany. The group controls 27 production and project management divisions in 11 countries, its products are available in 74 countries, owns 32 subsidiaries and 120 sales offices around the world. Viessmann is a major winter sport and motorsport sponsor.