- All sections
- B - Performing operationstransporting
- B66D - Capstanswinchestackles, e.g. pulley blockshoists
- B66D 1/52 - Control devices automatic for varying rope or cable tension, e.g. when recovering craft from water
Patent holdings for IPC class B66D 1/52
Total number of patents in this class: 79
10-year publication summary
|
11
|
7
|
10
|
9
|
4
|
3
|
4
|
2
|
2
|
2
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Itrec B.V. | 503 |
7 |
| Ernst-b. Johansen AS | 6 |
3 |
| Grant Prideco, Inc. | 385 |
3 |
| Liebherr-Werk Nenzing GmbH | 91 |
3 |
| Optilift AS | 5 |
3 |
| Technip France | 705 |
3 |
| Breeze-eastern LLC | 13 |
2 |
| Cameron Sense AS | 3 |
2 |
| IFP Energies Nouvelles | 2939 |
2 |
| IHC Holland IE B.V. | 265 |
2 |
| Reel Power Licensing Corp. | 78 |
2 |
| Societe de Commercialisation des Produits de La Recherche Appliquee Socpra Sciences et Genie S.E.C. | 54 |
2 |
| Exonetik Inc. | 64 |
2 |
| Hycom B.V. | 4 |
2 |
| Halliburton Energy Services, Inc. | 20924 |
1 |
| Atlas Elektronik GmbH | 398 |
1 |
| Cameron International Corporation | 1336 |
1 |
| China University of Mining and Technology | 1257 |
1 |
| The Cortland Companies, Inc. | 1 |
1 |
| Daewoo Shipbuilding & Marine Engineering Co., Ltd. | 231 |
1 |
| Other owners | 35 |