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Patents for John G. Leffingwell
Patents 1 - 2 of 2
First set of recordsLast set of records
NumberDatePatenteeTitleType
334,247Jan. 12, 1886J.G. LeffingwellMitering-machinesmiter machines
415,045Nov. 12, 1889J.G. LeffingwellCutting-machine
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