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on 24 Dec 2005
HUGHES TOOL COMPANY-USA
72182877 · 12 Dec 1963
023
ROCK BITS,ROCK BITS
on 25 May 2002
HUGHES TOOL COMPANY-USA
73201723 · 29 Jan 1979
007
Tool Bits for Drilling, Excavation and Mining Applications,Tool Bits f...
on 23 Feb 2002
HUGHES TOOL COMPANY-USA
73190312 · 23 Oct 1978
007
Hardfacing Sold as a Component of Tool Joints and Drill Bits,Hardfacin...
on 21 Sep 2001
HUGHES TOOL COMPANY-USA
73170352 · 15 May 1978
007
DIGGING OR MINING TOOLS-NAMELY, DRILL BITS,DIGGING OR MINING TOOLS-NAM...
on 21 Jul 2001
HUGHES TOOL COMPANY-USA
73182257 · 08 Aug 1978
004
LUBRICANT OR GREASE IN A TUBE,LUBRICANT OR GREASE IN A TUBE
on 02 Aug 1993
HUGHES TOOL COMPANY-USA
73580631 · 31 Jan 1986
007
OIL WELL DRILLING EQUIPMENT, NAMELY, DRILL COLLARS, SUBS, STABILIZERS,...
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