Charles William Donkin

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Well, GB

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Patents Grantslast 30 patents

Information Patent Grant
Downhole modulator apparatus
- Patent number 8,453,744
- Issue date Jun 4, 2013
- Sondex Wireline Limited
- John Buss
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
SIMPLIFIED MEASUREMENT OF BOREHOLE FLUID RESISTIVITY
- Publication number 20150136385
- Publication date May 21, 2015
- GE OIL & GAS LOGGING SERVICES, INC.
- James David RATCLIFFE
- E21 - EARTH DRILLING MINING
Information Patent Application
DOWNHOLE MODULATOR APPARATUS
- Publication number 20100126711
- Publication date May 27, 2010
- John BUSS
- E21 - EARTH DRILLING MINING