Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5164008 | Immobilization of incinerator ash toxic elements in an environmentally safe soil cement composition and method of manufacture | Clarence E. Leisey, III, Eric W. Shafer, Francis I. Daniels | 1992-11-17 |
| 5061318 | Immobilization of incinerator ash toxic elements in an environmentally safe soil cement composition and method of manufacture | Clarence E. Leisey, III, Eric W. Shafer, Francis I. Daniels | 1991-10-29 |
| 4864499 | Performance motivational game | — | 1989-09-05 |