When was barbed wire invented?

Who invented barbed wire?  Were was barbed wire inveted?  Who invented the barbed wire?  Invevted the barbed wire fence?  When were barbed wires invented?  Why is barbed wire so important?  When was the barbed wire invented?  Where was the barbed wire invented?  Who invented the barbed wire fence?  What year was barbed wire invented?  Who invented barbed wire in the year 1867?  When was barbed wire invented or discovered?  What happen before the barbed wire was invented?  What happend as a result of the invention of barbed wire?  What was the barbed wire barrier made by communist to halt the flow of refugees in 1961?