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Patents for Arthur R. Robertson
Patents 1 - 2 of 2
First set of recordsLast set of records
NumberDatePatenteeTitleType
352,070Nov. 02, 1886A.R. RobertsonMagnetic Tack-Hammertack hammers
710,615Oct. 07, 1902A.R. RobertsonMagnetic Tack-Hammertack hammers
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