Patents for H. E. Hartwell


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Patents for H. E. Hartwell
Patents 1 - 4 of 4
Picture	Number	Date	Patentee	Title
	D44,834	Nov. 04, 1913	E.A. Bardwell	Nail Set
	1,090,180	Mar. 17, 1914	F. Judge, F.O. Wells	Calipering Gage for Screw Threads
	1,145,852	Jul. 06, 1915	W. Schramm	Calipers
	1,152,761	Sep. 07, 1915	M.E. Provost	Micrometer Gage