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| All Patents in class 29/52 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,274,436 | Aug. 06, 1918 | B.A. Ryan, J.F. Murphy | Tool Holder for Screw Machines | metalworking machine tool holders | |
| 1,334,335 | Mar. 23, 1920 | W.M. Wheildon, H.E. Warren | Apparatus for treating metal objects | metal lathes | |
| 2,534,993 | Dec. 19, 1950 | E.J. Robichaud | Automatic Bar Stock Machine | metalworking machines | |
| 2,690,691 | Oct. 05, 1954 | H.H. Ranney | Single Spindle Automatic Lathe | automatic lathes | |