Issued Patents 1994
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5299448 | Positive pressure test apparatus for facepiece respirator | Richard D. Maryyanek, Joseph Z. Zdrok | 1994-04-05 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5299448 | Positive pressure test apparatus for facepiece respirator | Richard D. Maryyanek, Joseph Z. Zdrok | 1994-04-05 |