Fish & Richardson filed a patent infringement lawsuit in a Virginia court on behalf of Rembrandt Social Media. Facebook is being sued over the use of the "Like" button and other features on the social network. Rembrant is suing the social network on behalf of deceased Dutch programmer, Joannes Jozef Everadus van Der Meer. The lawsuit says Facebook infringed upon two Rembrandt patents and another by social media firm, Add This.