Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4757770 | Condensate sand collection system | Bohdan Lisowyj, David C. Hitchcock | 1988-07-19 |
| 4757772 | Sand collection system | Bohdan Lisowyj, David C. Hitchcock | 1988-07-19 |
| 4678647 | Process for the recovery of gallium and germanium from coal fly ash | Bohdan Lisowyj, David C. Hitchcock | 1987-07-07 |
| 4643110 | Direct fuel-fired furnace arrangement for the recovery of gallium and germanium from coal fly ash | Bohdan Lisowyj, David C. Hitchcock | 1987-02-17 |