Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6533629 | Spark plug including a wear-resistant electrode tip made from a co-extruded composite material, and method of making same | Jeffrey T. Boehler | 2003-03-18 |
| 6505597 | Cleansing oil filter containing quick-release liquid antioxidant/additive solution, and method of using same to convert an engine from petroleum-based oil to botanically-based oil | Ronald P. Rohrbach, Gerard W. Bilski | 2003-01-14 |