Thomas A. Johnson

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Kalkaska, MI, US

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Patents Grantslast 30 patents

Information Patent Grant
Stress detection tool using magnetic barkhausen noise
- Patent number 8,797,033
- Issue date Aug 5, 2014
- Microline Technology Corporation
- Bruce I. Girrell
- E21 - EARTH DRILLING MINING
Information Patent Grant
Pipe stress detection tool using magnetic barkhausen noise
- Patent number 8,035,374
- Issue date Oct 11, 2011
- Microline Technology Corporation
- Bruce I. Girrell
- E21 - EARTH DRILLING MINING