"U.S. Patent 146,671". Jacob Haish, DeKalb, Illinois, Improvement in Wire Fences – "spirally wrapped wires, the ends being hooked together to form projecting spikes" (January, 1874). Retrieved February 26, 2017.
"U.S. Patent 147,634". Improvement in Barbed Fences – "sheet metal pronged attachments", riveted or nailed to fence rails (February, 1874). Retrieved February 26, 2017.
"U.S. Patent 152,368". Barbed-Wire Fences – "twisted wires and spirally interwoven metallic strip having projecting spurs" (June, 1874). Retrieved February 26, 2017.
"U.S. Patent 167,240". Improvement in Wire-fence Barbs – "single piece of wire bent into the form of the letter S" so that both strands are clasped (August, 1875) This improvement was the foundation for Haish's successful business. Retrieved February 26, 2017.
