Marshall Feature Recognition, LLC has been running the same campaign since 2009, and it recently filed four additional suits, against Kao (2:14-cv-00021), Proctor and Gamble (2:14-cv-00023), Select Comfort (2:14-cv-00022), and Walgreen (2:14-cv-00024). The cases in the campaign assert a single patent (6,886,750) generally related to a printed ad with a machine recognizable feature that can then be used to access related electronic data. QR codes used in advertising have been the subject of previous litigation and that remains true in the new cases. The complaints allege that defendants use QR codes in printed advertisements and have associated digital content that is accessible by scanning the code.