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| All Patents in class 137/625.4 | |||||
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| Number | Date | Patentee | Title | Type | |
| 639,293 | Dec. 19, 1899 | H. Ritter | Sight Feed Oil Cup | oil cups | |
| 664,025 | Dec. 18, 1900 | L.H. Nash | Gas Engine | gas and gasoline engines | |