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Patents for Augustus R. Ehlers
Patents 1 - 2 of 2
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NumberDatePatenteeTitleType
78,443Jun. 02, 1868A.R. EhlersImprovement in sawmillsreciprocating sawmills
RE6,185Dec. 22, 1874A.R. EhlersImprovement in sawmillsreciprocating sawmills
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