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All Patents in class 266/249
Patents 1 - 3 of 3
First set of recordsLast set of records
65,946Jun. 18, 1867C. RichardsonImproved Apparatus for Tempering Steel Platestool making machines
150,289Apr. 28, 1874W. ClemsonImprovement in apparatus for tempering sawsmaking sawblades
1,253,966Jan. 15, 1918F.W. HarrisProcess and Apparatus for Treating Drill Pipeoilfield machinery
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