Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873972 | Disposable filter respirator with inner molded face flange | Otto L. Huber | 1989-10-17 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873972 | Disposable filter respirator with inner molded face flange | Otto L. Huber | 1989-10-17 |