- All sections
- E - Fixed constructions
- E01D - Bridges
- E01D 21/00 - Methods or apparatus specially adapted for erecting or assembling bridges
Patent holdings for IPC class E01D 21/00
Total number of patents in this class: 493
10-year publication summary
|
21
|
26
|
45
|
37
|
44
|
44
|
52
|
55
|
42
|
17
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| PERI SE | 445 |
14 |
| China Harbour Engineering Company Ltd. | 96 |
12 |
| Shandonghengkun Machinery Co, Ltd | 14 |
10 |
| Shanghai Civil Engineering Co., Ltd of CREC | 61 |
10 |
| Kollegger GmbH | 10 |
9 |
| Contech Engineered Solutions LLC | 280 |
7 |
| Precasteel LLC | 12 |
7 |
| Road & Bridge International Co., Ltd. | 22 |
7 |
| ArcelorMittal | 2608 |
6 |
| Hunan University | 180 |
6 |
| VSL International AG | 91 |
6 |
| Fuzhou University | 336 |
5 |
| Korea Institute of Civil Engineering and Building Technology | 140 |
5 |
| China Tiesiju Civil Engineering Group Co., Ltd. | 34 |
5 |
| The First Civil Engineering Co., Ltd. of CREC Shanghai Group | 16 |
5 |
| The First Engineering Co., Ltd. of Ctce Group | 10 |
5 |
| Flatiron Constructors, Inc. | 6 |
4 |
| PERI GmbH | 161 |
4 |
| Rubrica Ingenieria y Arquitectura, S.L. | 12 |
4 |
| Valmont Industries, Inc. | 468 |
4 |
| Other owners | 358 |