Intellectual property related to design, certification, manufacture, and assembly of aircraft.

Mitsubishi stole about as much as they could from Bombardier, and still can't get a plane our the door. The MRJ program is so screwed up that they had to re-engineer a significant portion of the aircraft design and the program to the SpaceJet. The 75 seater is DOA and Bombardier is stellar at weight reduction and streamlined engineering, Bombardier just don't know to run a low margin business efficiently.