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Patents Granted on 1879-12-02
Patents 1 - 3 of 3
First set of recordsLast set of records
222,178Dec. 02, 1879T.F. CarverImprovement in machines for making metal screwsscrew machines
222,297Dec. 02, 1879J. MichelsImprovement in hoop sawing and finishing machineshoop making machines
222,304Dec. 02, 1879R.H. OsgoodImprovement in inserted saw-teethinsertible saw teeth
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