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| All Patents in class 123/255 | |||||
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| Number | Date | Patentee | Title | Type | |
| RE12,635 | Apr. 16, 1907 | H. Soeldner | Oil Engine | oil engines | |
| 1,022,178 | Apr. 02, 1912 | B. Brazelle | Internal-combustion motor | gas and gasoline engines | |
| 1,134,858 | Apr. 06, 1915 | R.M. Hvid | Means for Delivering Oil to Oil Burning Engines | oil engines | |
| 2,443,912 | Jun. 22, 1948 | R.M. Hvid | Internal Combustion Engine | oil engines | |