The very first transistor was the point-contact transistor, and that was Bardeen and Brattain.
NPR: Electronics Pioneer William Shockley's Legacy
There's the junction transistor and a point-contact transistor.
The oldest ancestor of the point-contact transistor was the crystal detector, used in early wireless sets.
ECONOMIST: The middle age of the transistor
To create the point-contact transistor, Shockley's team modified the cat's whisker by placing two fine metal wires close together on the surface of a germanium crystal, turning it from a diode into a triode.
He was that point-contact transistor type.
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