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Innovations

Date	Innovations	City	Country	State	Society
1918	Holt Caterpillar Tractor	Stockton	USA	CA	ASME
1904	Holt Track-Type Tractor	aStockton	USA	CA	ASABE

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The Innovation Gateway a project of the highly respected, 30-year-old Invention & Technology—America’s only popular magazine of the history of engineering. To create the website, the American Heritage Society is partnering with the leading engineering societies including ACS, AIAA, ASABE, ASME, ASCE, and IEEE to put together in one location over 2,000 detailed essays on the history of engineering and the enormous range of contributions that inventors and engineers have made to our modern world. is created by American Heritage Publishing.

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