Kelly's "Thorny Fence" With Staple Barb Barbed Wire, Patented 1868

Inventors received hundreds of patents for barbed wire during the late 1800s. Some innovators created strands of fencing with sharp metal points cut into the wire; others incorporated small wire spurs twisted and attached to the wire to create a painful barrier. Each inventor believed their variation made the best fencing to keep livestock out of crop fields or confine them to pastures.