Christopher J. Kliefoth

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Orefield, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Radon remediation in form-drain apparatus
- Patent number 5,474,400
- Issue date Dec 12, 1995
- CertainTeed Corporation
- Christopher J. Kliefoth
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING