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All Patents in class 122/434
Patents 1 - 2 of 2
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NumberDatePatenteeTitleType
93,790Aug. 17, 1869P.C. WortmanImprovement in Feed-Water Heatersfeedwater apparatus
RE8,216May 07, 1878P.C. WortmanImprovement in Feed-Water Heatersfeedwater apparatus
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