Hannover
Germany
9
2008-03-20
The entities that hold a legal rights for patent applications filed by inventor Hahn Detlef:
Detlef Hahn from Hannover, DE has applied for patents for these inventions. The list has both pending applications and granted patents:
Oscillating shear valve for mud pulse telemetry
#2 | 2008-03-06Downlink pulser for mud pulse telemetry
#3 | 2007-10-18Neutron source for well logging
#4 | 2007-07-31Downlink pulser for mud pulse telemetry
#5 | 2007-03-29Active bottomhole pressure control with liner drilling and completion systems
#6 | 2006-06-08Oscillating shear valve for mud pulse telemetry
#7 | 2005-12-13Oscillating shear valve for mud pulse telemetry and associated methods of use
#8 | 2005-11-24Reciprocating pulser for mud pulse telemetry
#9 | 2005-05-24Hydraulically balanced reciprocating pulser valve for mud pulse telemetry
4130791 ⎘