リー・ド・フォレスト
Around April 1920 the "California Theater Station" in San Francisco, originally under an Experimental license as 6XC, inaugurated a wide-ranging selection of daily broadcasts. The next year inventor Lee de Forest wrote that this was the "first radio-telephone station devoted solely" to broadcasting to the public. The station was relicensed as KZY late in 1921, then deleted in early 1923.