Patent holding corporation NTP, which conventional a $612.5 million settlement from BlackBerry manufacturer Research in Motion in a patent violation case, has filed patent court cases beside six makers of smartphones or correlated software, as well as Apple and Google.

NTP, based in Richmond, Virginia, also filed patent court cases beside Microsoft, LG Electronics, HTC and Motorola in U.S. District Court for the Eastern District of Virginia, the corporation proclaimed.

NTP blamed the six corporations of infringe eight patents interrelated to escape of e-mail above wireless communications systems. "Utilize of NTP's academic belongings lacking a license is just plain unjust to NTP and its licensees," Donald Stout, NTP's co-founder, said in a declaration. "Unluckily, proceeding is our only means of making sure the inventor of basic technology on which wireless email is based, Tom Campania, and NTP shareholders are known, and are quite and sensibly remunerated for their innovative work and investment."

By adding to RIM, NTP has licensing agreements with Good Technology, Nokia and Visto, the corporation said in a media release.

Legislature of HTC and Motorola had no statement on court cases. Representatives of other four corporation facing lawsuits didn't have instant comments or didn't instantly react to a appeal for comments.