Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5672399 | Filter material construction and method | Denis J. Dudrey | 1997-09-30 |
| 5669949 | Air filtration arrangement | Denis J. Dudrey, Erland D. Anderson | 1997-09-23 |
| 5622537 | Filtration arrangement | Susan B. Reinhart, Denis J. Dudrey, John T. Herman | 1997-04-22 |