Patents for W. H. Maynard


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Patents for W. H. Maynard
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	41,894	Mar. 08, 1864	H.S. Shepardson	Improvement in Countersinks
	44,225	Sep. 13, 1864	H.S. Shepardson	Improvement in Spirit-Levels