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| Patents Granted on 1930-01-21 | |||||
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| Number | Date | Patentee | Title | Type | |
| DE-489,519 | Jan. 21, 1930 | H.H. Asbridge | Zahnradschleifmaschine, bei der die Form der Zahnflanken durch eine Leitkurve erzeugt wird | ||
| 1,744,413 | Jan. 21, 1930 | N.F. McNaught, E.H. Peterson | Socket-wrench tool | ||
| 1,744,499 | Jan. 21, 1930 | G.M. Pelton | Mechanism for shifting the saws of gang edgers | sawmills | |
| 1,744,550 | Jan. 21, 1930 | J.T. Janette | Pump and storage tank | industrial tanks | |