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| All Patents in class 123/41.02 | |||||
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| Number | Date | Patentee | Title | Type | |
| 433,806 | Aug. 05, 1890 | N.A. Otto | Motor Engine Worked by Oil Vapor | oil engines | |
| 571,239 | Nov. 10, 1896 | C.W. Pinkney | Internal Combustion Engine | oil engines | |