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All Patents in class 417/320
Patents 1 - 3 of 3
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NumberDatePatenteeTitleType
8,172XApr. 28, 1834J.A. Pitts, H.A. PittsEndless chain pumpchain pumps
172,395Jan. 18, 1876A.D. CrosbyChain Pumpchain pumps
343,685Jun. 15, 1886A. WyckoffBucket for chain-pumps
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