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Patents for John H. Crowell
Patents 1 - 2 of 2
First set of recordsLast set of records
NumberDatePatenteeTitleType
285,017Sep. 18, 1883J.H. CrowellDividersdividers
450,214Apr. 14, 1891J.H. Crowell, T.H. BlairCameracameras
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