| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 5 | |
| #2 | WIPO (World Intellectual Property Organization) | 4 | |
| #3 | Australia | 3 | |
| #4 | EPO (European Patent Office) | 3 | |
| #5 | Canada | 2 | |
| #6 | Mexico | 2 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Civil engineering | |
| #3 | Machine tools | |
| #4 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Pipes | |
| #2 | Earth drilling | |
| #3 | Nails | |
| #4 | Making metal sheets | |
| #5 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Church Kris L | 14 |
| #2 | Gandy John | 3 |
| #3 | Riel Bill | 1 |
| #4 | Church Kris | 1 |
| #5 | Riel William G | 1 |
| #6 | Leng Kuo-Tsung | 1 |
| Publication | Filing date | Title |
|---|---|---|
| WO2014052314A1 | Threaded pipe connection with a pressure energized flex-seal | |
| US7152700B2 | Dual wall drill string assembly | |
| US2005284664A1 | Dual wall drill string assembly | |
| US7007984B2 | Hang-free thread design | |
| US6832789B2 | Threaded pipe connection with cylindrical metal-to-metal, high pressure containment seal |