File:Holt Tractor-type Patent.png
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 04:21, 25 February 2010 |  | 612 × 991 (50 KB) | Btphelps | {{Information |Description={{en|1=Holt Machinery Company patent for a track-type tractor, number #1076578. Filing date: 18 Feb 1913; issue date: 21 Oct 1913.}} |Source=http://www.google.ca/patents?id=NTdvAAAAEBAJ |Author=U.S. Patent Offcie |Date= |Permiss |
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