The use of patent citation root-trees, shown in the “Patent Citation Root-Trees” figure, can also uncover technologies which might be under exploration by competitors of the merger. Such trees also have the advantage that they show companies that might be interested in sublicensing the art who are not competitors. If this is the case these patents can generate extra cash flow and value for the merger. This information can also be uncovered by specific software search engines programed to search on the basis of citation relationships. Ambercite is one such example.