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Patents for John Herbert Vandeventer
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	CA-137,517	Dec. 26, 1911	J.H. Vandeventer	Rotary Engine
	AU-160,911	Apr. 16, 1912	J.H. Vandeventer	Improvements in Rotary Engines

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