All Patents in class 172/550


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All Patents in class 172/550
Patents 1 - 4 of 4
Picture	Number	Date	Patentee	Title
	250,726	Dec. 13, 1881	A. Guerdan	Cutterhead for stave-sawing machines
	293,135	Feb. 05, 1884	E. Benjamin	Planer-knife
	1,041,980	Oct. 22, 1912	A.J. Dremel	Rotary cultivator
	1,258,882	Mar. 12, 1918	A.J. Dremel	Soil-milling machine