- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F16K - Valvestapscocksactuating-floatsdevices for venting or aerating
- F16K 3/312 - Line blinds
Patent holdings for IPC class F16K 3/312
Total number of patents in this class: 51
10-year publication summary
|
3
|
4
|
6
|
4
|
11
|
5
|
5
|
5
|
2
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Deltavalve, LLC | 52 |
7 |
| Saudi Arabian Oil Company | 12579 |
5 |
| 1075878 Alberta Ltd. | 7 |
3 |
| Aramco Services Company | 3787 |
2 |
| Binder GmbH | 54 |
2 |
| SISTAG AG Absperrtechnik | 8 |
2 |
| Worldwide Oilfield Machine, Inc. | 51 |
2 |
| Sammi Machinery Co., Ltd. | 4 |
2 |
| Onis | 15 |
2 |
| Boxy Blind Valve Co., Ltd. | 3 |
2 |
| Danhydra A/S | 12 |
2 |
| Emerson Automation Solutions Final Control US LP | 38 |
2 |
| Advanced Valve Technologies, Inc. | 1 |
1 |
| Beijing Aerospace Propulsion Institute | 16 |
1 |
| Dr. Ing. h.c. F. Porsche Aktiengesellschaft | 2655 |
1 |
| Hydril USA Distribution LLC | 206 |
1 |
| ITT Engineered Valves LLC | 18 |
1 |
| Johnson, David | 12 |
1 |
| Marathon Petroleum Company LP | 338 |
1 |
| Oneida Air Systems, Inc. | 59 |
1 |
| Other owners | 10 |