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Patents for Mathew F. Biersdorf
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	1,142,138	Jun. 08, 1915	M.F. Biersdorf	Combined Lock and Butt Gage
	1,282,670	Oct. 22, 1918	M.F. Biersdorf	Combined Lock and Butt Gage

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