Patents for William Simpkin


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Patents for William Simpkin
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	325,507	Sep. 01, 1885	J.M. Bond, A. Delaney	Saw-mill dog
	348,832	Sep. 07, 1886	W. Simpkin, A. Delaney	Apparatus for the purification of gas