Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5981917 | Ladle preheat indication system | Roberto Bandelli | 1999-11-09 |
| 5975754 | Method for monitoring the wear and extending the life of blast furnace refractory lining | Yongfu Zhao | 1999-11-02 |
| 5961214 | Determining protective layer thickness of blast furnaces | Yongfu Zhao | 1999-10-05 |
| 5944421 | Method for determining the conditions of heat transfer in a blast furnace | Yongfu Zhao | 1999-08-31 |
| 5890805 | Method for monitoring the wear and extending the life of blast furnace refractory lining | Yongfu Zhao | 1999-04-06 |