- 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: 374
10-year publication summary
|
20
|
43
|
36
|
41
|
26
|
25
|
18
|
25
|
21
|
11
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Emerson Process Management Regulator Technologies, Inc. | 391 |
40 |
| Robert Bosch GmbH | 44160 |
20 |
| Fisher Controls International LLC | 1457 |
14 |
| Continental Automotive GmbH | 4503 |
13 |
| Danfoss A/S | 1432 |
13 |
| Marshall Excelsior Company | 70 |
8 |
| Pierburg GmbH | 480 |
8 |
| Zhejiang DunAn Artificial Environment Co., Ltd | 703 |
5 |
| Dresser LLC | 294 |
5 |
| Schaeffler Technologies AG & Co. KG | 10968 |
4 |
| Aerojet Rocketdyne, Inc. | 175 |
4 |
| Cortec, L.L.C. | 29 |
4 |
| Eugen Seitz AG | 35 |
4 |
| Samson Aktiengesellschaft | 276 |
4 |
| Tescom Corporation | 111 |
4 |
| Vitesco Technologies GmbH | 2397 |
4 |
| IMI Critical Engineering LLC | 112 |
4 |
| Neptune Technology Group LLC | 112 |
4 |
| Kohler Co. | 4147 |
3 |
| Cavagna Group S.p.A. | 61 |
3 |
| Other owners | 206 |