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| Patents Granted on 1929-03-12 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,704,741 | Mar. 12, 1929 | J. Hartness | Automatic Die | taps and dies | |
| 1,705,095 | Mar. 12, 1929 | K. Rejtö, K. Pecz | Water Purifier | water filters | |
| 1,705,218 | Mar. 12, 1929 | W.F. Groene | Milling Machine | milling machines | |
| 1,705,230 | Mar. 12, 1929 | G.W. Binns | Grinding Machinery | grinding machines | |
| 1,705,231 | Mar. 12, 1929 | D.M. Bliss | Short-circuiting device | repulsion start induction run motors | |