Lawrence L. Macha

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Gas, KS, US

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Patents Grantslast 30 patents

Information Patent Grant
Expandable diameter drill bit
- Patent number 9,879,482
- Issue date Jan 30, 2018
- Lawrence L. Macha
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Expandable Diameter Drill Bit
- Publication number 20160258221
- Publication date Sep 8, 2016
- Lawrence L. Macha
- E21 - EARTH DRILLING MINING