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| Patents for Ernest R. Llewellyn | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 1,845,428 | Feb. 16, 1932 | E.R. Llewellyn | Screw Thread Lock | |
 | 1,853,737 | Apr. 12, 1932 | E.R. Llewellyn | Power Transmission Mechanism for Lathes or the Like | |
 | 1,881,750 | Oct. 11, 1932 | E.R. Llewellyn | Antifriction Bearing Mounting | |
 | 1,958,106 | May 08, 1934 | E.R. Llewellyn, G.H. Higgins | Shaper and Power TransmittingMechanism Therefor | |
 | 1,979,333 | Nov. 06, 1934 | E.R. Llewellyn | Power Transmitting Apparatus | |