- 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: 471
10-year publication summary
|
45
|
33
|
53
|
36
|
35
|
44
|
44
|
40
|
44
|
18
|
| 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 | 654 |
33 |
| Fisher Controls International LLC | 1481 |
13 |
| Robert Bosch GmbH | 43751 |
9 |
| Emerson Process Management Regulator Technologies, Inc. | 389 |
9 |
| Weir Minerals Netherlands B.V. | 63 |
8 |
| Zhejiang Sanhua Intelligent Controls Co., Ltd. | 220 |
8 |
| Dresser LLC | 291 |
7 |
| BYD Company Limited | 6279 |
6 |
| Waters Technologies Corporation | 1787 |
6 |
| Kerr Machine Co. | 171 |
6 |
| Caldera Engineering, LC | 22 |
5 |
| Tescom Corporation | 114 |
5 |
| TLV Co., Ltd. | 338 |
5 |
| SPM Oil & Gas Inc. | 357 |
5 |
| Cameron International Corporation | 1369 |
4 |
| CareFusion 303, Inc. | 2335 |
4 |
| Mac Valves, Inc. | 79 |
4 |
| Strahman Valves, Inc. | 32 |
4 |
| Danfoss A/S | 1408 |
4 |
| Apalta Patents OU | 10 |
4 |
| Other owners | 322 |