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| All Patents in class 123/184.41 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,233,739 | Jul. 17, 1917 | L.W. Witry | Internal-combustion engine | gas and gasoline engines | |
| 1,417,804 | May 30, 1922 | D.P. Davies | Internal Combustion Engine | fuel primers | |