David B. Raaf

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Independence, MO, US

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Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for installing a helical pier with pressurized...
- Patent number 5,575,593
- Issue date Nov 19, 1996
- Atlas Systems, Inc.
- David B. Raaf
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Helical outrigger assembly serving as an anchor for an underpinning...
- Patent number 5,482,407
- Issue date Jan 9, 1996
- Atlas Systems Inc.
- David B. Raaf
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING