Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9724548 | Terminating expansion of underground coal fires and protecting the environment | David A. Johnson | 2017-08-08 |
| 5753865 | Load measurement | — | 1998-05-19 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9724548 | Terminating expansion of underground coal fires and protecting the environment | David A. Johnson | 2017-08-08 |
| 5753865 | Load measurement | — | 1998-05-19 |