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Patents for John C. Humphreys
Patents 1 - 2 of 2
Number
Date
Patentee
Title
Type
370,542
Sep. 27, 1887
J.C. Humphreys
Cutter-head
cutterheads
471,337
Mar. 22, 1892
J.C. Humphreys
Churn
churns
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