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All Patents in class 241/101.71
Patents 1 - 3 of 3
First set of recordsLast set of records
1,950,501Mar. 13, 1934J.J. MacKayRock crushing plant
2,117,300May 17, 1938J. CorserRock crushing machine
2,256,731Sep. 23, 1941G.C. WintherMeans for forming and segregating rock chips from aggregates
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