Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5020008 | Method of calibrating vehicle speed signals | John D. Chambers, Duncan E. Estep, Walter E. Frankiewicz, James M. Lawson | 1991-05-28 |
| 4939659 | Speed/rpm transmitting device | Stephen P. Moran, James M. Lawson, Duncan E. Estep | 1990-07-03 |