(left to right): John Bardeen (1908-1991), William Bradford Shockley (1910-1989), Charles Hard Townes (b. 1915), and Walter Houser Brattain (1902-1987)
Group photo of four Nobel laureates at retirement ceremonies at Bell Laboratories for Walter Houser Brattain (1902-1987). In 1967, John Bardeen (1908-1991), who had worked at Bell Laboratories, was on faculty at University of Illinois; William Bradford Shockley (1910-1989) was on faculty at Stanford University; Charles Hard Townes was at MIT (he moved to University of California-Berkeley later that year). Bardeen, Shockley, and Walter Brattain had shared Nobel Prize in 1956 for work that led to development of transistor; Townes shared a Nobel in physics in 1955 with two Soviet scientists; Bardeen received a second Nobel in physics in 1972.
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