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Patents for Harland H. Coffin
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	3,055,714	Sep. 25, 1962	H.H. Coffin	Die set bearing
	3,170,735	Feb. 23, 1965	H.H. Coffin	Insulated die set
	3,195,374	Jul. 20, 1965	H.H. Coffin	Method of making an electrically insulated joint

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