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.
Norsk Hydro Norsk Hydro ASA (often referred to as just "Hydro") is a Norwegian aluminium and renewable energy company, headquartered in Oslo. As of 2016, Hydro is one of the largest aluminium companies worldwide. It has operations in some 50 countries around the world and is active on all continents. The Norwegian state owns 43.8% of the company through the Ministry of Trade and Industry. A further 6.5% is owned by Folketrygdfond, which administers the Government Pension Fund of Norway. Norsk Hydro employs approximately 12,500 people. Svein Richard Brandtzæg has been the CEO since 2009.