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| All Patents in class 29/33P | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,617,606 | Feb. 15, 1927 | H.C. Pierle | Machine Tool | metalworking machines | |
| 1,835,591 | Dec. 08, 1931 | E.P. Bullard, Jr. | Automatic Work Feeding and Chucking Means for Mulltiple Spindle Lathes | machine mechanisms | |
| 2,202,878 | Jun. 04, 1940 | H.E. Tautz | Drill press guard | drilling and boring | |
| 2,807,973 | Oct. 01, 1957 | H.J. Siekmann, W.H. Meyer, administrator, W.R. Meyer, deceased (estate of) | Apparatus for Manufacturing Crankshafts Automatically | crankshaft lathes | |