NEIVA bulit the Piper Aircrafts under license from 1975 to 2000.
Embraer produced the EMB-810(Seneca II)/820(Cheiftain) and Cherokee versions from 1974 to 1980. When Embraer aquired Neiva in 1980 production was transfered. Interestingly from 1984 Neiva started a program of refitting EMB-820 aircraft with PT-6 550 hp with a 1000lb increase in max weight. A number of other South American countries produced aircraft or parts for Piper but only Embraer built aircraft were differentiated with a unique type. I have heard a rumor that they are not allowed to be transfered to US registration as part of the licence agreement and are cheaper to aquire as a result. I was warned when purchasing PA34 or PA31 to check the actual serial number records to ensure it was an actual Piper not Embraer as this would affect resale.