R. Alan Duckworth

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Farnham, GB

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Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for conveying solids using a high velocity vacuum
- Patent number 4,776,731
- Issue date Oct 11, 1988
- Briggs Technology, Inc.
- Aubrey C. Briggs
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING