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WALTER BRATTAIN - ENVELOPE SIGNED CIRCA 1979 - HFSID 205120

 
WALTER BRATTAIN
Envelope signed: "Brattain", 6½x3½. Envelope addressed in Brattain's hand to Sherry Sussman, Las Vegas, Nevada, 15-cent Einstein stamp affixed, postmarked Tri Cities, Washington, March 29, 1979. Brattain has signed his name above the printed return address of Whitman College, Walla Walla, Washington. Brattain, John Bardeen and William Shockley won the 1956 Nobel Prize for Physics for their investigation of the properties of semiconductors-materials of which transistors are made and for the development of the transistor. The transistor replaced the bulkier vacuum tube for many uses and was the forerunner of micro-miniature electronic parts. Additional cancellation grooves on verso show through lightly at signature. Otherwise, fine condition.


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WALTER BRATTAIN  


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WALTER BRATTAIN
Born: February 10, 1902
Died: October 13, 1987



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