Respuesta :
					                   I know that one of them was the cotton gin, but the other one has to be printing press. If not hopefully someone would correct me. ;)
					                
					                
					             
					                   Looks like The printing press and The steam engine to me. Considering the Cotton gin was actually an "American" invention while the p/p and s/e were both European. 
					                
					                
					              
			                  