Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6164644 | Method of modifying electronics contained in a controller box of a pinball machine | Bradley D. Cornell, John R. Krutsch | 2000-12-26 |
| 6158737 | Playfield assembly for a pinball-machine | Bradley D. Cornell, John R. Krutsch | 2000-12-12 |
| 6135449 | Mounting mechanism for a playfield of a pinball machine | Bradley D. Cornell, John R. Krutsch | 2000-10-24 |
| 6120021 | Lock-down bar release system for a pinball machine | Peter J. Piotrowski, John R. Krutsch, George A. Gomez, Charles R. Bleich | 2000-09-19 |
| 5465963 | Height adjustable pinball game cabinet | — | 1995-11-14 |
| 5338031 | Combination tilt switch and playfield incline indicator | James X. Glass | 1994-08-16 |
| 4971324 | Variable position flipper mechanism for pinball games | Irwin J. Grabel | 1990-11-20 |