Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6256944 | Method and system for keeping water from entering dispenser containment sumps | David Lyzinski, Michael S. Butkovich, Charles M. Daul | 2001-07-10 |
| 6113820 | Method to repair polyethylene containment sumps | David Lyzinski, Paul A. Sivak, Charles M. Daul | 2000-09-05 |
| 6074131 | Method for installing form in-place dispenser containment | Charles M. Daul, Paul A. Sivak, David Lyzinski | 2000-06-13 |
| 6050050 | Form in-place submersible pump containment | Charles M. Daul, Paul A. Sivak, David Lyzinski | 2000-04-18 |
| 5983916 | Upgrade of below grade fill to at grade fill | Charles M. Daul, Paul A. Sivak, David Lyzinski | 1999-11-16 |
| 5105073 | Credit card reader extender | Michael S. Butkovich | 1992-04-14 |