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Patents for R. Schaefer
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	946,140	Jan. 11, 1910	H.A. Knoke	Draw-clamp
	1,053,556	Feb. 18, 1913	O. Bergstrom	Corner-clamping appliance
	1,067,541	Jul. 15, 1913	C.A. Palmgren	Stapling device

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