Inventor · disambiguated record
Hongfei Duan
Also filed as: DUAN HONGFEI
1 granted patent·1 pending application·0 citations·filing 2016–2024
3Inventor score
Top patents by PatentIndex Score
2 records- 0147US12291831B1Grouting pipe and construction method of desert water storage areaCHINA ACADEMY SAFETY SCIENCE & TECHNOLOGY·Filed 2024·Granted May 6, 2025·0 cites·18 claims
- 0223US2018080320A1Method for over-pit and under-pit cooperative control of roofs of far and near fields of an extra-large stoping spaceDATONG COAL MINE GROUP CO LTD·Filed 2016·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →