Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6394151 | Dual mode propane fuel dispensing apparatus and method | Mark D. Hoebener | 2002-05-28 |
| 5668310 | Vehicle fuel usage tracking device | Michael K. Parkman, John Whittaker | 1997-09-16 |
| 5505076 | Vehicle fuel usage tracking device | Michael K. Parkman, John Whittaker | 1996-04-09 |