Complex sentence: He patented the great american tintype on February 19,1856 and it was first called a melainotype, then ferrotype (by a rival manufacturer of the iron plates used), but the world knows them as tintypes.
Split into simpler sentences: He patented the great american tintype on February 19,1856. It was first called a melainotype, then ferrotype (by a rival manufacturer of the iron plates used), but the world knows them as tintypes.