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All Patents in class 356/394
Patents 1 - 2 of 2
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NumberDatePatenteeTitleType
1,377,069May 03, 1921J. HartnessMechanism for Gaging Screw Threads
1,745,523Feb. 04, 1930R.O. BeardsleyApparatus for Testing Taper Threaded Screws
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