Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5668310 | Vehicle fuel usage tracking device | John Whittaker, Curtis J. Donaldson | 1997-09-16 |
| 5505076 | Vehicle fuel usage tracking device | John Whittaker, Curtis J. Donaldson | 1996-04-09 |