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Demonstration of the first transistor
The first workable transistor was demostrated on December 24, 1947. Its creators were employees of Bell Telephone Laboratories company. Their names are now known to the whole world, these are scientists-physicists Walter Brattain, William Shockley and John Bardeen.
The first transistor was a small metal cylinder 13 mm long and it was demonstrated in a receiver that did not have electronic tubes. In addition the company assured that the device could be used not only for amplification but also for generating or converting an electrical signal.