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Patent number:
Patent Date:
Patents for Ruth M. W. Koger
Patents 1 - 2 of 2
Picture
Number
Date
Patentee
Title
1,172,336
Feb. 22, 1916
N.H. Anderson
Tapping-machine
1,269,493
Jun. 11, 1918
O. Newlander
Gear Cutting Machine
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