Boring or penetrating the earth
With means movable relative to tool to receive, retain, or...
Core-retaining or severing means
Corporate Assignee
active
No affiliations
Adjustable bearing section core barrel
Anti-jamming core barrels
Apparatus for downward displacement of an inner tube within a co
Apparatus for making and breaking screw couplings
Automatic drill pipe inside wiper
LandOfFree
Norton Christensen, Inc. does not yet have a rating. At this time, there are no reviews or comments for this inventor.
If you have personal experience with Norton Christensen, Inc., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Norton Christensen, Inc. will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-P-174776