Lawyers who represent a company accused of infringing on a patent for kitty litter must pay the price for engaging in gamesmanship, a federal judge held.In a written opinion this week, U.S. Magistrate Judge Sidney I. Schenkier sanctioned both Nestle Purina PetCare Co. and its lawyers for trying to gain an unfair advantage during discovery proceedings in a lawsuit brought against Purina by Oil-Dri Corporation of America …