A method for playing a lotto type lottery game. The method comprises the following steps: selling a first plurality of lottery tickets for a lotto style lottery game in which prizes are paid out at both the jackpot and sub-jackpot levels; drawing a first winning combination; and selling a second plurality...http://www.google.com.hk/patents/US5186463?utm_source=gb-gplus-share專利 US5186463 - Method of playing a lottery game
