Inventor · disambiguated record
Wilfried Piefenbrink
Also filed as: PIEFENBRINK WILFRIED
2 granted patents·94 citations·filing 1991–1995
67Inventor score
Technology areasE21D
Files withHDRK MINING RES LTD2
Top patents by PatentIndex Score
2 records- 0176US5938288AAutomatic control system and method for a machine used for excavating drifts, tunnels, stopes, or cavernsHDRK MINING RES LTD·Filed 1995·Granted Aug 17, 1999·69 cites·27 claims
- 0251US5340199AMethod and machine for excavating drifts, tunnels, stopes, caverns or the likeHDRK MINING RES LTD·Filed 1991·Granted Aug 23, 1994·25 cites·22 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →