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Patents for Karel F. Henneman
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	510,068	Dec. 05, 1893	K.F. Henneman	Gas Coffee Roaster
	550,999	Dec. 10, 1895	K.F. Henneman, G.C. Otten	Coffee Roaster

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