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Inventor
CHEN DEMIN
US
2 patents
Patents
2 patents
US10125552B2
Nov 13, 2018
Convex ridge type non-planar cutting tooth and diamond drill bit
CNPC USA CORP
17 citations
83
US10563464B2
Feb 18, 2020
Convex ridge type non-planar cutting tooth and diamond drill bit
CNPC USA CORP
7 citations
81