Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6401677 | Cam rocker variable valve train device | Ronald J. Pierik | 2002-06-11 |
| 6382153 | Partial internal guide for curved helical compression spring | Ronald J. Pierik, Thomas H. Fischer, William R. Haslett | 2002-05-07 |