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Image: Benjamin Holt 1894

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Benjamin_Holt_1894.jpg ‎(250 × 439 pixels, file size: 96 KB, MIME type: image/jpeg)

Description: Benjamin Holt, first to patent a workable tractor-type crawling tread design, at age 45 in 1894.
Title: Benjamin Holt 1894
Credit: http://www.hardhat.com/ME2/Audiences/dirmod.asp?sid=&nm=&type=Publishing&mod=Publications%3A%3AArticle&mid=8F3A7027421841978F18BE895F87F791&id=C7B7A45E312E4D2AA8F2189E32A620E5&tier=4
Author: Unknown authorUnknown author
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Usage Terms: Public domain
License: Public domain
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