Issued Patents 2004
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6712966 | Graded particle-size retention filter medium for cell-type filter unit | John L. Pulek, William Larsen, Charles Thomas Paul, Clifford L. Schorr, Francis J. Swiatek | 2004-03-30 |