- All sections
- E - Fixed constructions
- E21D - Shafts; tunnels; galleries; large underground chambers
- E21D 11/40 - Devices or apparatus specially adapted for handling or placing units of linings for tunnels or galleries
Patent holdings for IPC class E21D 11/40
Total number of patents in this class: 127
10-year publication summary
|
10
|
4
|
15
|
11
|
12
|
14
|
19
|
6
|
10
|
3
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sandvik Intellectual Property AB | 1634 |
9 |
| J.H. Fletcher & Co. | 82 |
5 |
| NV Bekaert SA | 750 |
5 |
| Inchalam SA - Industrias Chilenas de Alambre | 13 |
5 |
| Bouygues Travaux Publics | 30 |
4 |
| Geobrugg AG | 100 |
4 |
| Herrenknecht AG | 186 |
4 |
| Komatsu Ltd. | 4265 |
3 |
| China University of Mining and Technology | 1189 |
3 |
| Reline America, Inc. | 7 |
3 |
| China Construction Third Engineering Bureau Group Co., Ltd | 20 |
3 |
| Ccteb Infrastructure Construction Investment Co., Ltd. | 4 |
3 |
| ABB Inc. | 18 |
2 |
| Everest Equipment Co. | 5 |
2 |
| Kubota Corporation | 3054 |
2 |
| Lock-Block Ltd. | 33 |
2 |
| REI, Inc. | 23 |
2 |
| Technological Resources Pty. Limited | 444 |
2 |
| MI Robotic Solutions S.A. | 15 |
2 |
| Warren Environmental & Coating, LLC | 60 |
2 |
| Other owners | 60 |