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| All Patents in class 123/302 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 399,348 | Mar. 12, 1889 | G.M. Richards | Hydrocarbon Engine | |
| 536,090 | Mar. 19, 1895 | J. Kosakoff, V. List | Petroleum or Oil Engine | ||