Strictly speaking, the technical content of this invention is not high, but it has caused great controversy, because the original invention did not appear to prevent people from entering and leaving, but to limit the entry and exit of cattle.

/kloc-in the middle of the 0/9th century, people began to settle on the American prairie. For small farmers, this is an opportunity for self-reliance. But they were stopped by large-scale cattle farmers, who drove their cattle across the colonial fields. But ordinary fences are not strong enough to keep these animals out. For immigrants, the only solution is to enclose their land with barbed wire. American farmer Joseph? Gideon invented the method of manufacturing this kind of barbed wire on a large scale and made a fortune by selling it to American farms.