UPDATE: 8/19/14, 10:40 a.m. EDT. The names of the lawyers from Procopio have been added to the 12th paragraph of this story.

Several Am Law 100 firms have sought to carve out a niche in the corporate inversions space, but Cadwalader, Wickersham & Taft may have found a way to help more U.S. companies use the controversial maneuver to lower their tax bills.