- All sections
- E - Fixed constructions
- E21D - Shafts; tunnels; galleries; large underground chambers
- E21D 11/04 - Lining with building materials
Patent holdings for IPC class E21D 11/04
Total number of patents in this class: 36
10-year publication summary
2
|
4
|
5
|
4
|
3
|
6
|
0
|
4
|
4
|
0
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Agence Nationale pour La Gestion des Dechets Radioactifs | 46 |
4 |
Constructions Mecaniques Consultants | 6 |
4 |
Showa Denko K.K. | 2539 |
2 |
Kajima Corporation | 87 |
2 |
HIRO Corporation Ltd. | 2 |
2 |
Consejo Superior de Investigaciones Cientificas (csic) | 1254 |
1 |
Cornerstone Research Group, Inc. | 67 |
1 |
Dimillo, Tony | 7 |
1 |
Hyperloop Technologies, Inc. | 207 |
1 |
JFE Metal Products & Engineering Inc. | 7 |
1 |
Next Innovation inc. | 29 |
1 |
Shandong University | 886 |
1 |
Shonan Gosei-Jushi Seisakusho K.K. | 44 |
1 |
Telene S.A.S. | 11 |
1 |
Zhejiang Xinzhou Bamboo-based Composites Technology Co., Ltd | 38 |
1 |
Advantic LLC | 2 |
1 |
Samsung C&T Corporation | 160 |
1 |
Ling Ye | 5 |
1 |
CrossCut Enterprises LLC | 2 |
1 |
Changjiang Survey Planning Design and Research Limited Co. | 3 |
1 |
Other owners | 7 |