- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F17D - Pipe-line systemspipe-lines
- F17D 1/20 - Arrangements or systems of devices for influencing or altering dynamic characteristics of the systems, e.g. for damping pulsations caused by opening or closing of valves
Patent holdings for IPC class F17D 1/20
Total number of patents in this class: 133
10-year publication summary
|
10
|
10
|
2
|
12
|
4
|
7
|
8
|
7
|
4
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Saudi Arabian Oil Company | 13428 |
12 |
| Aramco Services Company | 4039 |
4 |
| Canada Pipeline Accessories, Co. Ltd. | 94 |
4 |
| Scale Protection AS | 10 |
3 |
| Equinor Energy AS | 503 |
3 |
| Yunnan Dahongshan Pipeline Ltd. | 9 |
3 |
| Schlumberger Canada Limited | 7373 |
2 |
| Halliburton Energy Services, Inc. | 20977 |
2 |
| Caterpillar Inc. | 9644 |
2 |
| Air Products and Chemicals, Inc. | 1449 |
2 |
| President and Fellows of Harvard College | 6005 |
2 |
| ATCO Gas and Pipelines Ltd. | 9 |
2 |
| Emulate, Inc. | 219 |
2 |
| Flowtech Co., Ltd. | 19 |
2 |
| Nordson Corporation | 1205 |
2 |
| Petroleo Brasileiro S.A. - Petrobras | 865 |
2 |
| Solray Holdings Limited | 4 |
2 |
| Chengdu Qinchuan IoT Technology Co., Ltd. | 466 |
2 |
| Lleb Holdings, LLC | 9 |
2 |
| Obschestvo S Ogranichennoi Otvetstvennostju "tekhpromarma" (ooo "tekhpromarma") | 2 |
2 |
| Other owners | 76 |