Merge combines the patents from the lists which you put in the List Processing Box, eliminating duplicate entries in the process. This can be helpful when you are doing a series of keyword searches and you would like to preserve the list from each separate search and then combine them for further analysis.

The Intersect function works on the lists that you put in the List Processing Box and produces a list which contains the patents that are in all of the lists.

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The Subtract function works on the lists that you put in the List Processing Box. It subtracts the last list from the previous list.

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The button clears ALL lists from the List Processing Box.

To remove a specific list from the List Processing Box click on the list and then click on the Remove Selected Item button on the top of the List Processing Box.