- All sections
- E - Fixed constructions
- E02D - Foundationsexcavationsembankmentsunderground or underwater structures
- E02D 29/14 - Covers for manholes or the likeFrames for covers
Patent holdings for IPC class E02D 29/14
Total number of patents in this class: 548
10-year publication summary
|
73
|
54
|
54
|
48
|
44
|
47
|
40
|
45
|
31
|
23
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hubbell Incorporated | 3442 |
30 |
| EJ EMEA | 43 |
17 |
| Neenah Foundry Company | 40 |
16 |
| ACO Severin Ahlmann GmbH & Co. KG | 91 |
15 |
| Saint-Gobain Pam | 66 |
13 |
| Sewer Sentry LLC | 15 |
13 |
| EJ USA, Inc. | 23 |
12 |
| Channell Commercial Corporation | 92 |
11 |
| Novinium, LLC | 102 |
10 |
| Norinco | 12 |
8 |
| Nippon Telegraph and Telephone Corporation | 15922 |
7 |
| Canada Pipe Company ULC | 46 |
6 |
| East Jordan Iron Works, Inc. | 12 |
6 |
| Oldcastle Infrastructure, Inc. | 98 |
6 |
| Core Cap | 10 |
6 |
| Mueller International, LLC | 744 |
5 |
| Press-seal Corporation | 42 |
5 |
| Rooftop Anchor, Inc. | 19 |
5 |
| Wrekin Holdings Limited | 5 |
5 |
| ACO Ahlmann SE & Co. KG | 331 |
5 |
| Other owners | 347 |