. "1500"^^ . . . . . "3.4E8"^^ . "Communications & Power Industries"@en . "CPI International, Inc. is the holding company for Communications & Power Industries, the largest manufacturer and rebuilder of electron devices (primarily vacuum tubes) in the United States. CPI was founded in 1995 [1] when Varian Associates sold its electron-device business (the original business of its founders) to concentrate on medical systems."@en . . . "CPI International, Inc."@en . . "1995Z"^^ .