Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5373869 | Test probe for face piece respirators | — | 1994-12-20 |
| 5299448 | Positive pressure test apparatus for facepiece respirator | Richard D. Maryyanek, Keith Simpson | 1994-04-05 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5373869 | Test probe for face piece respirators | — | 1994-12-20 |
| 5299448 | Positive pressure test apparatus for facepiece respirator | Richard D. Maryyanek, Keith Simpson | 1994-04-05 |