Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4934361 | Respirator | John Michel | 1990-06-19 |
| 4850346 | Respirator | John Michel | 1989-07-25 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4934361 | Respirator | John Michel | 1990-06-19 |
| 4850346 | Respirator | John Michel | 1989-07-25 |