The present invention is a system and method to sell or procure complementary goods. A complementary good according to the invention is a good whose value or utility is enhanced when paired with another good, such a pair of goods is a communications license to encumbered spectrum and a complementary...http://www.google.es/patents/US8145555?utm_source=gb-gplus-sharePatente US8145555 - System and method for the efficient clearing of spectrum encumbrances
System and method for the efficient clearing of spectrum encumbrances