You learn something every day,i'm a huge rotor fan and always was,but i was never aware Nissan had a crack.
I guess one of the biggest,most shamefull acts back then was when all the big manufacturers bought up most of the patents put in place by Mr.Wankel just to protect thier own investment in out dated heavy iron with a squillion moving parts.
I suspect had this not taken place back then we would all be wizzing around in highly developed fuel friendly wankels(that can be rebuilt before lunch)and the motor industry would look quite differant today with hardly a push rod insight.