Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7757653 | Integrated exhaust manifold and cylinder head gasket | Darrell Charles Drouillard | 2010-07-20 |
| 6425243 | Hybrid exhaust manifold for combustion engines | Peter Chen, Michael Marvin Landgraf | 2002-07-30 |