In August 2012, Lululemon filed suit against Calvin Klein and supplier G-III Apparel Group for infringement of three Lululemon design patents for yoga pants.[49] The lawsuit was somewhat unusual as it involved a designer seeking to assert intellectual property protection in clothing through patent rights. On November 20, 2012, lululemon filed a notice of voluntary dismissal in the Delaware courts based upon a private settlement agreement reached between the parties that dismissed the suit.[50]