Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6394600 | Replaceable lens system | Michael Horn | 2002-05-28 |
| 6338341 | Protective breathing mask | Ralf Drews | 2002-01-15 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6394600 | Replaceable lens system | Michael Horn | 2002-05-28 |
| 6338341 | Protective breathing mask | Ralf Drews | 2002-01-15 |