Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6524849 | Biological filter structures | Baron V. Adams, Paul C. John | 2003-02-25 |
| 6479276 | Biological filter apparatus | Randall R. Thom, Paul C. John, James T. Boswell, William C. Stewart | 2002-11-12 |