Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9165801 | Partial solution replacement in recyclable persulfuric acid cleaning systems | Richard O. Henry, David F. Hilscher, Charles J. Taft, Robert W. Zigner, Jr. | 2015-10-20 |
| 8992691 | Partial solution replacement in recyclable persulfuric acid cleaning systems | Richard O. Henry, David F. Hilscher, Charles J. Taft, Robert W. Zigner, Jr. | 2015-03-31 |