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Patents for Speed Changing Pulley Co.
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	681,144	Aug. 20, 1901	F.W. Spacke	Speed Varying Pulley
	681,145	Aug. 20, 1901	F.W. Spacke	Self Contained Speed Varying Pulley
	797,001	Aug. 15, 1905	F.H. Heitger	Speed-Changing Gear

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