Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6653747 | Electronic key system including ignition and transmission control | David T. Proefke, Thomas E. Utter, Robert Baillargeon, Thomas W. Pfeffer, Andrew C. Brenz +4 more | 2003-11-25 |
| 6386447 | Smart card with card in vehicle warning | David T. Proefke, Thomas E. Utter, Robert Baillargeon, Thomas W. Pfeffer, Andrew C. Brenz +4 more | 2002-05-14 |