Michael Filshtinsky

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Salt Lake City, UT, US

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Patents Grantslast 30 patents

Information Patent Grant
Coring device with an improved core sleeve and anti-gripping collar...
- Patent number 4,566,545
- Issue date Jan 28, 1986
- Norton Christensen, Inc.
- Arthur L. Story
- E21 - EARTH DRILLING MINING
Information Patent Grant
Coring device with an improved weighted core sleeve and anti-grippi...
- Patent number 4,512,423
- Issue date Apr 23, 1985
- Christensen, Inc.
- James T. Aumann
- E21 - EARTH DRILLING MINING