№ EP4673570A1발명
심사 중HARDENED GRAPPLING ELEMENTS FOR RETRIEVING DOWNHOLE TOOLS, GRAPPLING TOOL, METHOD FOR MANUFACTURING A GRAPPLING ELEMENT OF A GRAPPLING TOOL
HARDENED GRAPPLING ELEMENTS FOR RETRIEVING DOWNHOLE TOOLS, GRAPPLING TOOL, METHOD FOR MANUFACTURING A GRAPPLING ELEMENT OF A GRAPPLING TOOL
❖National Oilwell Varco, L.P.ROSSING, Michael; BUNKER, William; HERNANDEZ, JR., DanielJan 6, 2026C21D, C21D, C21D +1023