- Varian Associates
Varian Associates was a company founded in
1948by Russell H. and Sigurd F. Varian, William Webster Hansen, and Edward Ginztonto sell the klystron, the first tube which could generate electromagnetic waves at microwave frequencies, and other electromagnetic equipment.
1999, Varian Associates spun off its semiconductor equipment business into Varian Semiconductorand its scientific equipment business into Varian, Inc.The remaining medical equipment company renamed itself as Varian Medical Systems.
Continental Electronics, a subsidiary from 1985 to 1990
* Communications & Power Industries, a 1995 spin-off, which includes the Varian brothers' original klystron business
Varian Data Machines, a former division of Varian Associates that sold minicomputers
* [http://www.cpii.com/history.cfm Early history of Varian Associates] hosted by Communications & Power Industries, which bought Varian's electron device business in 1995
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