Issued Patents All Time
Showing 26–31 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6508707 | Gaming machines with board game theme, apparatus and method | Lawrence E. DeMar, Joel R. Jaffe, Erica Frohm, William Grupp, Robert J. Wilson, Jr. +1 more | 2003-01-21 |
| 6506117 | Gaming machines with board game theme | Lawrence E. DeMar, Joel R. Jaffe, Erica Frohm, William Grupp, Robert J. Wilson, Jr. +1 more | 2003-01-14 |
| 6482089 | Gaming machines with board game theme | Lawrence E. DeMar, Joel R. Jaffe, Erica Frohm, William Grupp, Robert J. Wilson, Jr. +1 more | 2002-11-19 |
| 6315660 | Gaming machines with board game theme | Lawrence E. DeMar, Erica Frohm, William Grupp, Joel R. Jaffe, Robert J. Wilson, Jr. +1 more | 2001-11-13 |
| 6203429 | Gaming machine with bonus mode | Lawrence E. DeMar, Erica Frohm, William Grupp | 2001-03-20 |
| 6159098 | Dual-award bonus game for a gaming machine | William Grupp | 2000-12-12 |