Here is what we found using Docket Navigator. In the 45 day period (8/2/11 - 9/15/11) prior to the America Invents Act (AIA), 265 complaints were filed in the top six district courts (courts with the greatest number of patent cases filed), involving 2,272 unique parties. In those same courts during the 45 day period following the AIA (9/16/11 - 10/31/11) 248 complaints were filed, but they involved only 848 parties.
We also looked at that same time period exactly one year prior for comparison. In the 45 day period before 9/15/2010 (twelve months prior to the AIA) 147 complaints were filed, involving 940 unique parties. During the 45 day period after 9/15/2010, 169 complaints were filed, involving 940 parties. (Click on the charts below to zoom in)