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| All Patents in class 29/38D | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,415,530 | May 09, 1922 | F.M. Davis | Feeding and clamping means for metal-working machines | metalworking machine mechanisms | |
| 2,035,043 | Mar. 24, 1936 | E.P. Bullard, Jr., E.C. Bullard | Cylindrical Surface Turning Machine | ||
| 2,035,737 | Mar. 31, 1936 | L.E. Mehlhope, G.W. Binns | Grinding Machine | grinding machines | |
| 2,272,055 | Feb. 03, 1942 | G.A. Carlson | Polishing and grinding machine | polishing and buffing machinery | |