Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5025946 | Anti-theft device for tank openings | Michael S. Butkovich, Irwin Ginsburgh | 1991-06-25 |
| D296462 | Combined petroleum fuel spillage and overfill containment tank | Harry B. Hartman, Michael S. Butkovich | 1988-06-28 |
| 4615362 | Overfill and spillage protection device | Harry B. Hartman, Michael S. Butkovich | 1986-10-07 |