Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7238327 | Method of attaching internal heat shield in automotive catalytic converters | Carl Irving, Chris Darr, Houliang Li, Darren Nance | 2007-07-03 |
| 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 |