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Patents for Robert O. Beardsley
Patents 1 - 3 of 3
First set of recordsLast set of records
1,715,813Jun. 04, 1929R.O. BeardsleyMounting for Screws and Taps
1,745,523Feb. 04, 1930R.O. BeardsleyApparatus for Testing Taper Threaded Screws
1,812,369Jun. 30, 1931R.O. Beardsley, R.W. PorterProjecting Mechanism and Gear Staging Devicegear measuring machines
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