Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5055192 | Cell-type filter cartridge retaining ring | John F. Krzyston | 1991-10-08 |
| 4881313 | Method of forming a cell filter with an exposed surface | John F. Krzyston | 1989-11-21 |
| 4783262 | Separator for cell type filter element | Eugene A. Ostreicher, Robert G. Barnes, Jr. | 1988-11-08 |