Assignee
DOUGLAS PRESS INC
US·5 granted patents·1 pending application·856 citations·filing 1989–2008
Top patents by PatentIndex Score
6 records- 0192US5046737ALottery-type game system with bonus awardDOUGLAS PRESS INC·Filed 1990·Granted Sep 10, 1991·316 cites·7 claims
- 0288US5407200ALottery-type gaming system having multiple playing levelsDOUGLAS PRESS INC·Filed 1994·Granted Apr 18, 1995·348 cites·20 claims
- 0388US4943090ALottery-type gaming apparatusDOUGLAS PRESS INC·Filed 1989·Granted Jul 24, 1990·148 cites·6 claims
- 0474US6880824B2Apparatus for controlling play of a progressively operated lottery-type gameDOUGLAS PRESS INC·Filed 2003·Granted Apr 19, 2005·43 cites·19 claims
- 0556US8047545B2Lottery-type game with rollover featureDOUGLAS PRESS INC·Filed 2008·Granted Nov 1, 2011·1 cites·26 claims
- 0641US2006197283A1Lottery-type gaming system for simulating an actual casino gameDOUGLAS PRESS INC·Filed 2005·Application pending·0 cites
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