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All Patents in class 269/112
Patents 1 - 4 of 4
Picture	Number	Date	Patentee	Title
	604,160	May 17, 1898	F. Reissman	Frame Clamp and Support
	840,777	Jan. 08, 1907	C.W. Lawson	Frame-clamp
	1,342,891	Jun. 08, 1920	O. Bergstrom	Quick-acting frame-clamping machine
	2,623,560	Dec. 30, 1952	A.H. Joseph	Polygonal framework type clamping machine

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