Isaac L. Ellwood | |
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| Born | Isaac Leonard Ellwood August 3, 1833 |
| Died | September 11, 1910 (aged 77) DeKalb, Illinois, US |
| Occupation(s) | Rancher, businessman |
| Known for | Pioneering of barbed wire |
| Relatives | Reuben Ellwood (brother) |
Isaac Leonard Ellwood (August 3, 1833 – September 11, 1910) was an American rancher, businessman and barbed wire entrepreneur.