Inventor · disambiguated record
Hengfeng Liu
Also filed as: LIU HENGFENG
2 granted patents·1 pending application·0 citations·filing 2018–2019
22Inventor score
Files withUNIV CHINA MINING3
Top patents by PatentIndex Score
3 records- 0145US11021954B2Method of recovering room-and-pillar coal pillar by using external replacement supportsUNIV CHINA MINING·Filed 2019·Granted Jun 1, 2021·0 cites·6 claims
- 0241US11339658B2Method for recovering room-type coal pillars by cemented filling of reserved roadwaysUNIV CHINA MINING·Filed 2018·Granted May 24, 2022·0 cites·4 claims
- 0340US2020378256A1Mine exploitation, separation, filling and treatment exploitation methodUNIV CHINA MINING·Filed 2019·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →