Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4906183 | Treatment of expansible materials to form lightweight aggregate | Robin A. Kyffin, Peter A. Young | 1990-03-06 |
| 4728471 | Treatment of expansible materials to form lightweight aggregate | Robin A. Kyffin, Peter A. Young | 1988-03-01 |
| 4199155 | Sealing means for rotary vessels | John G. Hogan | 1980-04-22 |