System and program product for selecting a lower cost supplier based on total cost and… Grant US-8055520-B2 United States of America 08 Nov 2011
System and method for procurement of products Grant US-7499871-B1 United States of America 03 Mar 2009
System, method, and program product for selecting a lower cost supplier based on total… Grant US-7389248-B2 United States of America 17 Jun 2008