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All Patents in class 33/787
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	1,196,703	Aug. 29, 1916	H. Kraut	Tool
	1,456,938	May 29, 1923	A.W. Schoof	Instument for Testing and Comparing the Lead of a Screw Thread
	2,476,189	Jul. 12, 1949	E. Guetzkow	Lead Gauge for Screw Threads

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