- All sections
- E - Fixed constructions
- E02B - Hydraulic engineering
- E02B 7/44 - Hinged-leaf gates
Patent holdings for IPC class E02B 7/44
Total number of patents in this class: 47
10-year publication summary
|
5
|
7
|
10
|
6
|
5
|
5
|
4
|
3
|
2
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hitachi Zosen Corporation | 618 |
16 |
| Floodbreak, L.L.C. | 33 |
3 |
| Steen Olsen Invest ApS | 4 |
3 |
| Asahi Inovex Corp. | 3 |
3 |
| Enduro Composites, Inc. | 28 |
1 |
| Henry K. Obermeyer | 3 |
1 |
| Kansei Company | 6 |
1 |
| LIXIL Suzuki Shutter Corporation | 4 |
1 |
| Nippon Koei Co., Ltd. | 17 |
1 |
| Rubicon Research Pty Ltd. | 70 |
1 |
| Tokyo Metropolitan Sewerage Service Corporation | 19 |
1 |
| IRT & Associates, Inc. | 3 |
1 |
| Hiroko Terata | 2 |
1 |
| Penta-ocean Construction Co.,Ltd. | 6 |
1 |
| Toyo Construction Co.,Ltd. | 3 |
1 |
| Van Den Noort Innovations BV | 4 |
1 |
| Euro InterConnections Ltd. | 1 |
1 |
| Jiangsu General Factory of Water Conservancy Machinery | 2 |
1 |
| Raycap Intellectual Proterty Ltd. | 1 |
1 |
| Art Metal Industries, LLC | 1 |
1 |
| Other owners | 6 |