- 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: 436
10-year publication summary
|
26
|
38
|
31
|
49
|
35
|
34
|
39
|
42
|
39
|
28
|
| 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 | 556 |
28 |
| Fisher Controls International LLC | 1507 |
13 |
| Robert Bosch GmbH | 42705 |
9 |
| Emerson Process Management Regulator Technologies, Inc. | 383 |
9 |
| Zhejiang Sanhua Intelligent Controls Co., Ltd. | 208 |
8 |
| BYD Company Limited | 5023 |
6 |
| Waters Technologies Corporation | 1697 |
6 |
| Weir Minerals Netherlands B.V. | 60 |
6 |
| Kerr Machine Co. | 144 |
6 |
| Caldera Engineering, LC | 17 |
5 |
| Mac Valves, Inc. | 84 |
5 |
| Tescom Corporation | 122 |
5 |
| TLV Co., Ltd. | 332 |
5 |
| Dresser LLC | 269 |
5 |
| SPM Oil & Gas Inc. | 328 |
5 |
| Cameron International Corporation | 1335 |
4 |
| CareFusion 303, Inc. | 2199 |
4 |
| Danfoss A/S | 1353 |
4 |
| Schlumberger Technology Corporation | 10780 |
3 |
| EcoWater Systems LLC | 135 |
3 |
| Other owners | 297 |