Edward Johnston

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Newark, DE, US

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus and process for manufacture of tunnel tubes
- Patent number 4,462,535
- Issue date Jul 31, 1984
- AMCA International Corporation
- Edward Johnston
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Apparatus for manufacture of tunnel tubes
- Patent number 4,418,561
- Issue date Dec 6, 1983
- AMCA International Corporation
- Edward Johnston
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING