- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F16K - Valvestapscocksactuating-floatsdevices for venting or aerating
- F16K 41/04 - Spindle sealings with stuffing-box with at least one ring of rubber or like material between spindle and housing
Patent holdings for IPC class F16K 41/04
Total number of patents in this class: 192
10-year publication summary
|
10
|
8
|
18
|
14
|
7
|
16
|
14
|
18
|
20
|
18
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Fisher Controls International LLC | 1504 |
14 |
| Dresser LLC | 280 |
7 |
| Robert Bosch GmbH | 43034 |
4 |
| Aegis Flow Technologies, L.L.C. | 23 |
4 |
| Engineered Controls International, LLC | 150 |
4 |
| GE Oil & Gas Pressure Control LP | 75 |
4 |
| KITZ Corporation | 211 |
4 |
| Asco SAS | 15 |
4 |
| Denso Corporation | 24755 |
3 |
| A.W. Chesterton Company | 92 |
3 |
| GlobalForce IP Limited | 40 |
3 |
| Parker Hannifin Manufacturing Limited | 49 |
3 |
| Zhejiang Sanhua Automotive Components Co., Ltd. | 309 |
3 |
| A&N Corporation | 7 |
3 |
| Danfoss A/S | 1356 |
3 |
| Flowserve Pte. Ltd | 359 |
3 |
| Baker Hughes Pressure Control LP | 33 |
3 |
| Mitsubishi Electric Corporation | 46870 |
2 |
| Caterpillar Inc. | 9730 |
2 |
| Aisin Seiki Kabushiki Kaisha | 2208 |
2 |
| Other owners | 114 |