- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F16K - Valvestapscocksactuating-floatsdevices for venting or aerating
- F16K 21/18 - Self-closing valves, i.e. closing automatically after operation closed when a rising liquid reaches a predetermined level
Patent holdings for IPC class F16K 21/18
Total number of patents in this class: 115
10-year publication summary
|
13
|
14
|
13
|
17
|
8
|
5
|
3
|
6
|
5
|
2
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Adel Wiggins Group | 13 |
6 |
| Graco Minnesota Inc. | 1255 |
4 |
| Walnab Pty Limited | 17 |
4 |
| Franklin Fueling Systems, LLC | 74 |
4 |
| OPW Fueling Components, LLC | 68 |
4 |
| Danco, Inc. | 205 |
4 |
| Dwyer Instruments, LLC | 97 |
4 |
| Lavelle Industries, Inc. | 85 |
3 |
| Nifco Inc. | 1104 |
3 |
| Flomax International, Inc. | 20 |
2 |
| Hgci, Inc. | 318 |
2 |
| Hydrogarden Wholesale Supplies Limited | 4 |
2 |
| Incoe Corporation | 52 |
2 |
| Jungheinrich Aktiengesellschaft | 357 |
2 |
| AdelWiggins Group | 5 |
2 |
| Stormwell Inc. | 15 |
2 |
| Eco (Xiamen) Technology Inc. | 23 |
2 |
| Cometflo Ltd. | 4 |
2 |
| GM Global Technology Operations LLC | 15722 |
1 |
| Ford Global Technologies, LLC | 21216 |
1 |
| Other owners | 59 |