Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6746018 | Shaft seal | Michael L. Lewis, Erwin R. Carrigan, Steven H. Griggs | 2004-06-08 |
| 6663313 | Mounting system for speed reducers | Michael L. Lewis, Erwin R. Carrigan, Steven H. Griggs | 2003-12-16 |