4. Wells
  5. Packers or plugs
  6. Spaced sealing portions

Rex E. Duhn

Inventor

Rate now
  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Inventor

active

Drilling quick connectors

Pipe joints or couplings – Having plural independent paths – For concentric tubes or pipes
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Ground subsiding wellhead

Wells – Above ground apparatus – Inner member anchor or seal with lateral port
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Ring seal packer

Wells – Packers or plugs – Spaced sealing portions
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Two-piece drilling flange

Wells – Above ground apparatus
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Well tubing rotator

Wells – Above ground apparatus – With tube rotating means
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Rex E. Duhn does not yet have a rating. At this time, there are no reviews or comments for this inventor.

If you have personal experience with Rex E. Duhn, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rex E. Duhn will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-P-39566

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.

Canada

 Charities
 Companies
 MP Candidates
 Patents
 Employee Salary Disclosure

World

 Places of the World
 Scientific Papers

United States

 Banks
 Companies
 Counties
 Patents
 Employee Salary Disclosure