Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6148258 | Electrical starting system for diesel engines | Mario Boisvert, David W. Shank, Ronald L. Ballast | 2000-11-14 |
| 5811967 | EGR valve linear position sensor having variable coupling transformer | David W. Shank | 1998-09-22 |