| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 6 | |
| #2 | Canada | 4 | |
| #3 | EAPO (Eurasian Patent Organization) | 2 | |
| #4 | WIPO (World Intellectual Property Organization) | 2 | |
| #5 | Australia | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Shafts |
| # | Name | Total Patents |
|---|---|---|
| #1 | Fan Xiaobing | 8 |
| #2 | Shao Zengyuan | 6 |
| #3 | Liu Xuezhong | 5 |
| #4 | Pu Bin | 4 |
| #5 | Zhao Yan | 4 |
| #6 | Chen Dongfang | 3 |
| #7 | Wu Peng | 3 |
| #8 | Guo Chengfu | 3 |
| #9 | Tian Hongping | 2 |
| #10 | Xia Feng Shou | 1 |
| Publication | Filing date | Title |
|---|---|---|
| CA2674716A1 | Tri-cone bits for horizontal and hard formation drilling applications | |
| US2005252692A1 | Roller bit with a journal pin offset from the central axis thereof | |
| US6176331B1 | Bearing sealing means of earth boring bits | |
| US6119797A | Single cone earth boring bit |