DAVID HOLDMAN

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Kingwood, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Downhole drilling motor with an adjustment assembly
- Patent number 10,233,700
- Issue date Mar 19, 2019
- APS Technology, Inc.
- Bill Murray
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
DOWNHOLE DRILLING MOTOR WITH AN ADJUSTMENT ASSEMBLY
- Publication number 20160290050
- Publication date Oct 6, 2016
- APS Technology, Inc.
- BILL MURRAY
- E21 - EARTH DRILLING MINING