Sony Corporation By 2020HueCheN May 7, 1946 Sony established Period: May 7, 1946 to Jan 29, 2014 Sony timeline Oct 14, 1947 Sales lunch of Sony's "power megaphone" Mar 30, 1958 Name changed to Sony Corporation Jan 30, 1960 Sony's first overseas operation Jul 16, 1979 The launch of the first stereo cassette player "Walkman Aug 7, 1991 Sony Pictures founded Dec 28, 2010 Sony indroduces e-book reader