Germanium Products (GPC)

Germanium Products Corp (GPC) was the first to produce a germanium junction transistor by the middle of 1952. Germanium Products Corporation was established in Jersey City, N. J as a subsidiary of RD&R and introduced one of the first junction transistors to the market with advertisements in the June 1952 issue of Radio & Television News magazine. A GPC TN-10 NPN germanium grown junction device appeared alongside two vacuum tubes in the Sonotone model 1010 hearing aid in late 1952.