Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6732429 | Method for measuring pressure on the substrate of spin formed catalytic converter | Li Houliang, Vincent Carrara, Earl Nelson, Doug Seifert, Paul Plenzler | 2004-05-11 |
| 6701617 | Spin-forming method for making catalytic converter | Houliang Li, Earl Nelson | 2004-03-09 |