However , Bell Laboratories did not draw attention to Tanenbaum 's discovery publicly .
On January 26 , 1954 , Tanenbaum recorded a successful demonstration of the first silicon transistor in his logbook .
Bell Laboratories did not draw attention to Tanenbaum 's discovery publicly .
On January 26 , 1954 , Tanenbaum recorded a successful demonstration of the first silicon transistor in his logbook .