Before revision: History The principle of complementary symmetry was first introduced by George Sziklai in 1953 who then discussed several complementary bipolar circuits.
After revision: 310x310px|1957, Diagram of one of the SiO2 transistor devices made by Frosch and DerrickHistory The principle of complementary symmetry was first introduced by George Sziklai in 1953 who then discussed several complementary bipolar circuits.