- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F16K - Valvestapscocksactuating-floatsdevices for venting or aerating
- F16K 39/02 - Devices for relieving the pressure on the sealing faces for lift valves
Patent holdings for IPC class F16K 39/02
Total number of patents in this class: 362
10-year publication summary
|
22
|
18
|
37
|
35
|
36
|
26
|
25
|
18
|
23
|
17
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Emerson Process Management Regulator Technologies, Inc. | 384 |
39 |
| Robert Bosch GmbH | 42887 |
20 |
| Fisher Controls International LLC | 1506 |
14 |
| Continental Automotive GmbH | 4758 |
13 |
| Danfoss A/S | 1354 |
12 |
| Marshall Excelsior Company | 69 |
8 |
| Pierburg GmbH | 470 |
8 |
| Tescom Corporation | 122 |
6 |
| Zhejiang DunAn Artificial Environment Co., Ltd | 580 |
5 |
| Dresser LLC | 275 |
5 |
| Schaeffler Technologies AG & Co. KG | 10067 |
4 |
| Control Components, Inc. | 81 |
4 |
| Cortec, L.L.C. | 23 |
4 |
| Samson Aktiengesellschaft | 279 |
4 |
| Vitesco Technologies GmbH | 2592 |
4 |
| Neptune Technology Group LLC | 103 |
4 |
| Kohler Co. | 4074 |
3 |
| Aerojet Rocketdyne, Inc. | 164 |
3 |
| CEME S.p.A. | 41 |
3 |
| Dresser, Inc. | 106 |
3 |
| Other owners | 196 |