- All sections
- E - Fixed constructions
- E02B - Hydraulic engineering
- E02B 7/20 - Movable barragesLock gates
Patent holdings for IPC class E02B 7/20
Total number of patents in this class: 135
10-year publication summary
|
19
|
18
|
10
|
24
|
10
|
8
|
8
|
7
|
4
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hitachi Zosen Corporation | 602 |
9 |
| Floodbreak, L.L.C. | 35 |
6 |
| Halo Maritime Defense Systems, Inc. | 21 |
4 |
| Smart Vent Products LLC | 20 |
4 |
| Hydroplus | 16 |
3 |
| RSA Protective Technologies, LLC | 20 |
3 |
| Rubicon Research Pty Ltd. | 70 |
3 |
| SWS Engineering S.p.A. | 11 |
3 |
| Verderg Ltd | 31 |
3 |
| Riverrestoration.org, LLC | 4 |
3 |
| China Power Consrtuction Group Guiyang Survey and Design Institute Co. Ltd | 6 |
3 |
| Chengdu Alangtech Co., Ltd. | 6 |
2 |
| The Chugoku Electric Power Co., Inc. | 511 |
2 |
| J.F. Brennan Company, Inc. | 24 |
2 |
| P.v. Flood Control Corp. | 31 |
2 |
| U-Tec Co., Ltd. | 9 |
2 |
| Littoral Power Systems Inc. | 19 |
2 |
| Van Den Noort Innovations BV | 4 |
2 |
| Steen Olsen Invest ApS | 3 |
2 |
| China Three Gorges Corporation | 224 |
2 |
| Other owners | 73 |