Patent trolls, and patent plaintiffs generally, were active on Wednesday. April 23.  184 cases were filed on Wednesday, by numerous plaintiffs, including Signal IP, various Joao Bock entities, Interface IP, PanTaurus, Olivistar, TQP Development, eDekka, and c4cast.  Of course, it could just be a bizarre coincidence, but as Dennis Crouch points out at Patently-O,…