Microwave oven
Japan's Sharp Corporation began manufacturing microwave ovens in 1961. Between 1964 and 1966, Sharp introduced the first microwave oven with a turntable, a feature that promotes convenient even heating of food. In 1965, Raytheon acquired Amana. In 1967, they introduced the first popular home model, the countertop Radarange, at a price of US$495 ($ in dollars).
Neff GmbH
In 1971 it introduced its "Circotherm" system whereby hot air was circulated around the oven to allow a distribution of cooking with more regularity. These cookers are known as convection oven or fan ovens, and are still for a specialist market. The Circotherm system was patented by the company, marketed under the slogan "Rundum-Hitze ist mehr" (all around heat is more). In 1985, the convection oven system was first introduced for gas ovens.