Field briefing
E21C · Mining or quarrying
Mining or quarrying. Patents classified in CPC E21C, part of Construction and mining.
Dates, owners, statuses and filings come from the published records. Derived views are counted from them. Highlighted text is a plain-English AI reading, written from a patent's title and abstract. Legal statuses and expiry dates are estimates, not legal advice.
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Connected industries
Other industries that share patents, companies or citations with Mining or quarrying.
Newest patents in E21C · Mining or quarrying
2 patents imported from the European Patent Office; newest published 2026-03-18; most active companies: Epiroc Rock Drills AB, Shanxi Tiandi Coal Mining Machinery Co Ltd, Taiyuan Inst China Coal Tech & ENG Group.
- HIGH VOLTAGE ELECTRO PULSE ROCK DRILLING EP4709960A1, published 2026-03-18
- Autonomous path planning system and method for roadway tunneling equipment based on hybrid difference and vision fusion CN121557987A, published 2026-02-24
Most active companies
Counted over the newest 2 imported patents in this industry.
- Epiroc Rock Drills AB 1 patent
- Shanxi Tiandi Coal Mining Machinery Co Ltd 1 patent
- Taiyuan Inst China Coal Tech & ENG Group 1 patent