Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6305909 | Engine arrangement for blowers and blower/vacuums | Mark D. Jankowski | 2001-10-23 |
| 6273035 | Internal combustion engine with induction system heat sink | Mark D. Jankowski, William E. Gest | 2001-08-14 |