HL

Hengfeng Liu

CT China University Of Mining And Technology: 2 patents #152 of 815Top 20%
Overall (All Time): #1,845,474 of 4,157,543Top 45%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
11339658 Method for recovering room-type coal pillars by cemented filling of reserved roadways Nan Zhou, Meng Li, Hao Yan, Jixiong Zhang 2022-05-24
11021954 Method of recovering room-and-pillar coal pillar by using external replacement supports Nan Zhou, Meng Li, Zhongya Wu, Jixiong Zhang 2021-06-01