| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 9 | |
| #2 | Canada | 3 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Mechanical elements | |
| #3 | Machines | |
| #4 | Machine tools | |
| #5 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Unspecified technologies | |
| #3 | Shafts | |
| #4 | Metal-working | |
| #5 | Geophysics | |
| #6 | Pipes | |
| #7 | Servomotors |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hickman Don Darrell | 12 |
| Publication | Filing date | Title |
|---|---|---|
| US2017138143A1 | Accumulator for blowout preventer control systems | |
| CA2830333A1 | Tong bearing | |
| CA2825502A1 | Method and apparatus for controlling oil well drill site systems | |
| US2014103641A1 | Method and system for tightening threaded elements and certifying the connections and the devices for connecting threaded elements | |
| US2012210827A1 | Rod tong assembly | |
| US2012103248A1 | Weighing and display station | |
| US2010300251A1 | Tong assembly | |
| US2008289166A1 | Method of making an open-head power tong assembly |