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| Patents for I. Dreyfus | |||||
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| Number | Date | Patentee | Title | Type | |
| 64,956 | May 21, 1867 | I. Dreyfus | Improvement in automatic lubricators | oil cups | |
| D3,434 | Mar. 30, 1869 | I. Dreyfus | Design for an oil-cup for journal-boxes | machine lubricators | |
| 106,261 | Aug. 09, 1870 | I. Dreyfus | Improvement in lubricators | oil cups | |
| 109,118 | Nov. 08, 1870 | I. Dreyfus | Improvement in lubricators | steam engine lubricators | |