Research in Motion today filed a lawsuit against rival cellphone designer Motorola, claiming both infringement on patents relating to its handset technology as well abusive licensing practices for its own licenses. Responsible for creating the BlackBerry smartphone line, RIM filed the complaint this weekend in a Northern District of Texas court and argues that Motorola is attempting to exclude competition both by refusing to license certains patents in its phones and by charging “extortionate” licensing fees for those patents it owns, penalizing RIM for using similar technology.

Read more: electronista.com