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| All Patents in class 192/3.54 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,111,326 | Sep. 22, 1914 | W.L. Schellenbach | Gearing | engine lathes | |
| 2,729,981 | Jan. 10, 1956 | H.F. Budzien | Reversible Power Transmission Mechanism | power transmissions | |