Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5458295 | Dual chamber coffee mill | Barry M. Haber | 1995-10-17 |
| 5002124 | Underground temperature and pressure measuring system for hot-exploiting oil well | Sun Zhenfang, Liu Li, Li Min, Wang Chunyan | 1991-03-26 |