Edwin H. Colpitts

Edwin Henry Colpitts (January 19, 1872 - 1949)
was a communications pioneer best known for his invention of the Colpitts oscillator.
As research branch chief for Western Electric in the early 1900s, he and scienists under his direction achieved significant advances in the development of oscillators and vacuum tube push-pull amplifiers.

In 1915, his team successfully demonstrated the first transatlantic radio telephone.