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All Patents in class 118/638
Patents 1 - 3 of 3
First set of recordsLast set of records
NumberDatePatenteeTitleType
2,027,308Jan. 07, 1936E.C. SchachtManufacture of abrasive articles
RE20,660Feb. 22, 1938E.C. SchachtMethod of coating and apparatus therefor and product
2,245,301Jun. 10, 1941E.C. SchachtManufacture of abrasive articles
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