AT&T Co has moved into court in its battle to drag an unwilling NCR Corp to the altar: it has asked the Federal District Court in Dayton, Ohio to order NCR to lift its poison pill defence that allows holders to buy new shares at 50 cents on the dollar in either NCR or a would-be hostile acquiror once the acquiror holds 15% or more of its shares; it also alleges NCR has violated the Securities & Exchange Act by suggesting that its shares are worth $125 a time; NCR dismissed the suit as a frivolous attempt to hide the fact that it had made a grossly inadequate offer for NCR.