Doc. Armstrong return   Doc. Fleming return      History telegraph   History telephone   History radio   History TV   History components   Scientists index   Bibliography	Edwin Howard Armstrong           Documents     May 19, 1921 Charles Terry, vice president of Westinghouse, congratulates Armstrong for winning the first case brought by Lee de Forest for the primacy of the super reaction. Cause will continue until 1934, when a decision by the Supreme Court of USA appoint De Forest as the inventor of the feedback circuit