Patent holdings for IPC class E21C 35/183

Total number of patents in this class: 237

10-year publication summary

18
18
21
29
19
25
13
11
2
7
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Principal owners for this class

Owner
All patents
This class
Element Six GmbH
105
30
US Synthetic Corporation
624
20
Kennametal Inc.
1388
19
Element Six Abrasives S.A.
147
19
The Sollami Company
54
19
Sandvik Intellectual Property AB
1484
13
Betek GmbH & Co. KG
144
12
Wirtgen GmbH
501
11
Element Six (UK) Limited
216
11
Schlumberger Technology Corporation
10691
9
Caterpillar Inc.
9539
9
Novatek IP, LLC
55
5
Keystone Engineering & Mfg. LLC
12
5
BOMAG GmbH
402
4
Sandvik Mining and Construction G.m.b.H.
91
4
Metalogenia, S.A.
53
3
Mitsubishi Materials Corporation
2438
3
ESCO Group LLC
314
3
Apergy BMCS Acquisition Corporation
7
3
Carriere Industrial Supply Limited
10
2
Other owners 33