Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5928954 | Tagging hydrocarbons for subsequent identification | Robert T. Roginski, George H. Vickers | 1999-07-27 |
| 5843783 | Tagging hydrocarbons for subsequent identification | Robert T. Roginski, George H. Vickers | 1998-12-01 |
| 5723338 | Tagging hydrocarbons for subsequent identification | Robert T. Roginski, George H. Vickers | 1998-03-03 |
| 5710046 | Tagging hydrocarbons for subsequent identification | Robert T. Roginski, George H. Vickers | 1998-01-20 |
| 4878847 | Patchfield system | — | 1989-11-07 |