| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 14 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Materials and metallurgy | |
| #3 | Machine tools | |
| #4 | Machines | |
| #5 | Surface technology and coating | |
| #6 | Chemical engineering |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Working metallic powder | |
| #3 | Unspecified technologies | |
| #4 | Grinding tools | |
| #5 | Alloys | |
| #6 | Chemical or physical processes | |
| #7 | Metal-working | |
| #8 | Metallic material removal |
| # | Name | Total Patents |
|---|---|---|
| #1 | Shen Yuelin | 14 |
| #2 | Zhang Youhe | 12 |
| #3 | Keshavan Madapusi K | 3 |
| #4 | Yong Zhou | 2 |
| #5 | Yu Jiaqing | 2 |
| #6 | Burhan Yuri | 2 |
| #7 | Durairajan Bala | 2 |
| #8 | Huang Sujian | 2 |
| #9 | Zhang Youhe John | 1 |
| #10 | Janssen Michael | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2011253457A1 | Drag bit with utility blades | |
| US2009152017A1 | Polycrystalline diamond construction with controlled gradient metal content | |
| US2009090562A1 | Cutting element having stress reduced interface | |
| US2008073126A1 | Polycrystalline diamond composites | |
| US2008296070A1 | Cutter geometry for increased bit life and bits incorporating the same |