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| All Patents in class 123/73BA | |||||
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| Number | Date | Patentee | Title | Type | |
| 924,856 | Jun. 15, 1909 | E. Thomson | Oil or Gas Engine | gas and gasoline engines | |
| 1,411,343 | Apr. 04, 1922 | W.W. Gore | Internal Combustion Engine | gas and gasoline engines | |