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All Patents of Type: conveyors and hoppers
Patents 1 - 3 of 3
First set of recordsLast set of records
1,671XFeb. 22, 1812S. WalgemoreImproved conveyor, elevator, and hopper boyelevators and lifts
2,885XDec. 31, 1817G.F. SaltonstallCotton hopper for cleaning cottonconveyors and hoppers
383,556May 29, 1888A.H. BrainardConveyerconveyors and hoppers
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