Nicholas H. Werthessen

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Cranston, RI, US

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Patents Grantslast 30 patents

Information Patent Grant
Retraction assemblies for expansible mandrels
- Patent number 4,616,958
- Issue date Oct 14, 1986
- Fru-Con Construction Corporation
- Nicholas H. Werthessen
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING