Patents for John Helwig


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Patents for John Helwig
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	444,635	Jan. 13, 1891	J. Helwig	Bolt and Rivet Cutter
	1,502,192	Jul. 22, 1924	J. Helwig	Wrench and Process of Manufacturing the Same