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All Patents in class 403/309
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	73,100	Jan. 07, 1868	G.W. Hubbard	Improvement in shaft-coupling
	126,183	Apr. 30, 1872	J. Charlton	Improvement in couplings for shaftings
	691,448	Jan. 21, 1902	J.J. Cowell	Shaft-coupling

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