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Patents for John J. Blackman
Patents 1 - 2 of 2
First set of recordsLast set of records
NumberDatePatenteeTitleType
683,009Sep. 17, 1901J.J. BlackmanSurface-finishing for floors, ceilings, etc.
697,787Apr. 15, 1902J.J. BlackmanDovetailing-machinedovetailing machines
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