- All sections
- E - Fixed constructions
- E21B - Earth or rock drillingobtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B 19/07 - Slip-type elevators
Patent holdings for IPC class E21B 19/07
Total number of patents in this class: 226
10-year publication summary
|
23
|
15
|
15
|
22
|
12
|
12
|
3
|
6
|
8
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Frank's International, LLC | 238 |
41 |
| Weatherford Technology Holdings, LLC | 2033 |
26 |
| Nabors Drilling Technologies USA, Inc. | 565 |
11 |
| Noetic Technologies Inc. | 125 |
9 |
| Itrec B.V. | 504 |
8 |
| National Oilwell Varco, L.P. | 1701 |
7 |
| Frank's International, Inc. | 62 |
6 |
| Canrig Robotic Technologies AS | 54 |
6 |
| McCoy Global Inc. | 49 |
5 |
| Schlumberger Technology Corporation | 11238 |
3 |
| Forum US, Inc. | 343 |
3 |
| Frank's Casing Crew and Rental Tools, Inc. | 13 |
3 |
| Nabors Lux 2 SARL | 21 |
3 |
| LUCAS, Brian, Ronald | 30 |
3 |
| Tubular Technology Tools LLC | 5 |
3 |
| Halliburton Energy Services, Inc. | 21117 |
2 |
| 2M-TEK, Inc. | 9 |
2 |
| Blohm + Voss Oil Tools GmbH | 3 |
2 |
| Claxton Engineering Services Limited | 12 |
2 |
| Grant Prideco, Inc. | 414 |
2 |
| Other owners | 79 |