Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6537459 | Method and apparatus for etching-manufacture of cylindrical elements | Michael J. Dufresne | 2003-03-25 |
| 6086773 | Method and apparatus for etching-manufacture of cylindrical elements | Michael J. Dufresne | 2000-07-11 |