Patent holdings for IPC class E21D 9/02

Total number of patents in this class: 10

10-year publication summary

0
1
2
0
1
0
0
1
2
0
2017 2018 2019 2020 2021 2022 2023 2024 2025 2026

Principal owners for this class

Owner
All patents
This class
China Railway Engineering Equipment Group Co., Ltd.
54
1
Vermeer Manufacturing Company
675
1
Sigma S.A.
3
1
Chang'an University
193
1
Hajduk Group Sp. z o.o.
1
1
Shanghai Investigation, Design & Research Institute Co., Ltd.
54
1
China Railway Beijing Engineering Group Co., Ltd
6
1
China Three Gorges Construction Engineering Corporation
16
1
The No. 1 Engineering Co., Ltd of China Railway Beijing Engineering Group
1
1
Perron Genesse, Karine
3
1
Other owners 0