Patents for William R. Clarkson


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Patents for William R. Clarkson
Patents 1 - 3 of 3
Number	Date	Patentee	Title	Type
286,388	Oct. 09, 1883	W.R. Clarkson	Ratchet bit-brace	ratchet braces
294,762	Mar. 11, 1884	W.R. Clarkson	Ratchet bit-brace	ratchet braces
301,339	Jul. 01, 1884	W.R. Clarkson	Bit-brace