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Patents for Alexander Groundwater Walls
Patents 1 - 3 of 3
First set of recordsLast set of records
NumberDatePatenteeTitleType
1,017,718Feb. 20, 1912A.G. WallsAutomatic spooling-machinetextile machines
1,270,573Jun. 25, 1918A.G. WallsPumpaircraft
1,395,213Oct. 25, 1921A.G. WallsBalling-machinetextile machines
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