24. The method as described in claim 22 , wherein the visualizing the results comprises assigning a color to each patent document in the patent portfolio according to a color model, having two input components whose mixture produces said color when the patent document is characterized by two patent indices, or having three input components whose mixture produces said color when the patent document is characterized by three patent indices, wherein values of the components of the color model are equal to respective values of patent indices.
24. The method as described in claim 22 , wherein the visualizing the results comprises assigning a color to each patent document in the patent portfolio according to a color model, having two input components whose mixture produces said color when the patent document is characterized by two patent indices, or having three input components whose mixture produces said color when the patent document is characterized by three patent indices, wherein values of the components of the color model are equal to respective values of patent indices. 25. The method as described in claim 24 , wherein the color model is RGB (Red, Green, Blue).