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All Patents in class 356/393
Patents 1 - 3 of 3
First set of recordsLast set of records
NumberDatePatenteeTitleType
1,480,390Jan. 08, 1924J. HartnessApparatus for Inspecting and Gauging Screw Threads
1,732,730Oct. 22, 1929R.W. PorterMethod and Apparatus for Measuring and Comparing Gears and the Like
1,745,523Feb. 04, 1930R.O. BeardsleyApparatus for Testing Taper Threaded Screws
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