Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5248419 | Sewage sludge treatment with gas injection | Charles A. Long, Jr., Robert D. Blythe, William A. Cobb | 1993-09-28 |
| 5147563 | Sewage sludge treatment with gas injection | Charles A. Long, Jr., Robert D. Blythe, William A. Cobb | 1992-09-15 |
| 4936983 | Sewage sludge treatment with gas injection | Charles A. Long, Jr. | 1990-06-26 |