Bell Laboratories demonstrated the first transistor on December 23, 1947.The scientific team at Bell Laboratories responsible for the solid-state amplifier included William Shockley, Walter Houser Brattain, and John Bardeen. The three scientists were jointly awarded the 1956 Nobel Prize in Physics for inventing the point-contact transistor. Bell Laboratories also patented the technology.
Publication number: US2524035 A
Patent Title: Three-electrode circuit element utilizing semiconductive materials
Publication date: 3 Oct 1950
Filing date: 17 Jun 1948
Inventors: JOHN BARDEEN; BRATTAIN WALTER H
Original Assignee: BELL TELPHONE LAB INC