Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4549934 | Flash zone draw tray for coker fractionator | Harlan G. Graf, Harry R. Janssen | 1985-10-29 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4549934 | Flash zone draw tray for coker fractionator | Harlan G. Graf, Harry R. Janssen | 1985-10-29 |