DD

David H. Douglas

WD Walker Digital: 3 patents #55 of 104Top 55%
Overall (All Time): #1,545,592 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
8533003 Method and apparatus for selecting a supplemental product to offer for sale during a transaction Raymond J. Mueller, Andrew S. Van Luchene, George M. Marrazzo, Shane Whalquist 2013-09-10
8103520 Method and apparatus for selecting a supplemental product to offer for sale during a transaction Raymond J. Mueller, Andrew S. Van Luchene, George M. Marrazzo, Shane J. Wahlquist 2012-01-24
7542919 Method and apparatus for selecting a supplemental product to offer for sale during a transaction Raymond J. Mueller, Andrew S. Van Luchene, George M. Marrazzo, Shane J. Wahlquist 2009-06-02