- 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: 484
10-year publication summary
|
45
|
33
|
53
|
36
|
35
|
44
|
44
|
40
|
44
|
31
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Zhejiang DunAn Artificial Environment Co., Ltd | 734 |
37 |
| Fisher Controls International LLC | 1425 |
12 |
| Robert Bosch GmbH | 44363 |
9 |
| Emerson Process Management Regulator Technologies, Inc. | 391 |
9 |
| Weir Minerals Netherlands B.V. | 63 |
8 |
| Zhejiang Sanhua Intelligent Controls Co., Ltd. | 231 |
8 |
| Dresser LLC | 301 |
7 |
| BYD Company Limited | 6629 |
6 |
| Waters Technologies Corporation | 1801 |
6 |
| Kerr Machine Co. | 180 |
6 |
| Caldera Engineering, LC | 21 |
5 |
| TLV Co., Ltd. | 339 |
5 |
| SPM Oil & Gas Inc. | 361 |
5 |
| Schlumberger Technology Corporation | 11961 |
4 |
| Cameron International Corporation | 1367 |
4 |
| CareFusion 303, Inc. | 2414 |
4 |
| Mac Valves, Inc. | 81 |
4 |
| Strahman Valves, Inc. | 32 |
4 |
| Technetics Group LLC | 44 |
4 |
| Tescom Corporation | 110 |
4 |
| Other owners | 333 |