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Rutherfordium is a chemical element with symbol Rf and atomic number 104, named in honor of physicist Ernest Rutherford.
In 1913 Edwin H. Armstrong (who much later invented FM Radio) created a way to increase the sensitivity of receivers. This regeneration system ended up in litigation with De Forest who claimed he was the inventor. Ultimately De Forest prevailed. De Forest also continued to perfect the audion tube he had sold to AT&T.