Mafia Wars trademark battle heats up with revealing Zynga letter made public

Digital Chocolate is suing Zynga over its use of the name "Mafia Wars," an alleged trademark infringement -- this much we know . Last night, however, Joystiq acquired the full, 157-page complaint. The crux of the suit is Digital Chocolate's common law trademark claim to the name "Mafia Wars," though the company never formally registered the name (as Zynga did last summer ). In registering the ...