- 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: 447
10-year publication summary
|
16
|
21
|
26
|
45
|
37
|
44
|
44
|
52
|
54
|
18
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| PERI SE | 402 |
11 |
| Shandonghengkun Machinery Co, Ltd | 14 |
10 |
| Shanghai Civil Engineering Co., Ltd of CREC | 54 |
10 |
| Contech Engineered Solutions LLC | 278 |
7 |
| Precasteel LLC | 11 |
7 |
| Kollegger GmbH | 8 |
7 |
| China Harbour Engineering Company Ltd. | 57 |
7 |
| ArcelorMittal | 2197 |
6 |
| Hunan University | 145 |
6 |
| VSL International AG | 87 |
6 |
| Flatiron Constructors, Inc. | 7 |
5 |
| Korea Institute of Civil Engineering and Building Technology | 134 |
5 |
| China Tiesiju Civil Engineering Group Co., Ltd. | 30 |
5 |
| The First Civil Engineering Co., Ltd. of CREC Shanghai Group | 16 |
5 |
| The First Engineering Co., Ltd. of Ctce Group | 10 |
5 |
| Road & Bridge International Co., Ltd. | 19 |
5 |
| Fuzhou University | 309 |
4 |
| PERI GmbH | 180 |
4 |
| Rubrica Ingenieria y Arquitectura, S.L. | 12 |
4 |
| Valmont Industries, Inc. | 448 |
4 |
| Other owners | 324 |