Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7785163 | Wave energy buoy | Steven M. Spencer | 2010-08-31 |
| 6551818 | Biological filter structures | William C. Stewart, Paul C. John | 2003-04-22 |
| 6479276 | Biological filter apparatus | Paul C. John, Charles S. Swift, James T. Boswell, William C. Stewart | 2002-11-12 |
| 5518920 | Biological treatment of hazardous waste | William C. Stewart | 1996-05-21 |