David B. Raaf

📍 Independence, MO: #76 of 256 inventorsTop 30%

🗺 Missouri: #8,863 of 23,789 inventorsTop 40%

Overall (All Time): #2,275,682 of 4,157,543Top 55%

Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
5575593	Method and apparatus for installing a helical pier with pressurized grouting	—	1996-11-19
5482407	Helical outrigger assembly serving as an anchor for an underpinning drive assembly	—	1996-01-09