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| All Patents in class 60/631 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,568,197 | Jan. 05, 1926 | J. Stumpf | Locomotive with combined drive | steam engines | |
| 1,576,549 | Mar. 16, 1926 | O.L. Riegels | Engine-starting device | motor vehicles | |
| 1,900,054 | Mar. 07, 1933 | F.C. Teufl, M.J. Goldberg | Reversing and Control Mechanism for Internal Combustion Engines | oil engines | |