- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F16K - Valvestapscocksactuating-floatsdevices for venting or aerating
- F16K 1/38 - Valve members of conical shape
Patent holdings for IPC class F16K 1/38
Total number of patents in this class: 420
10-year publication summary
|
26
|
45
|
33
|
53
|
36
|
35
|
42
|
43
|
36
|
20
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Zhejiang DunAn Artificial Environment Co., Ltd | 536 |
28 |
| Fisher Controls International LLC | 1477 |
13 |
| Robert Bosch GmbH | 42392 |
9 |
| Emerson Process Management Regulator Technologies, Inc. | 380 |
9 |
| Zhejiang Sanhua Intelligent Controls Co., Ltd. | 206 |
8 |
| Waters Technologies Corporation | 1687 |
6 |
| Dresser LLC | 265 |
6 |
| BYD Company Limited | 4742 |
5 |
| Caldera Engineering, LC | 17 |
5 |
| Mac Valves, Inc. | 82 |
5 |
| TLV Co., Ltd. | 334 |
5 |
| Kerr Machine Co. | 126 |
5 |
| SPM Oil & Gas Inc. | 320 |
5 |
| Cameron International Corporation | 1324 |
4 |
| CareFusion 303, Inc. | 2163 |
4 |
| Strahman Valves, Inc. | 33 |
4 |
| Tescom Corporation | 117 |
4 |
| Weir Minerals Netherlands B.V. | 54 |
4 |
| Danfoss A/S | 1345 |
4 |
| EcoWater Systems LLC | 136 |
3 |
| Other owners | 284 |