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| All Patents in class 123/74C | |||||
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| Number | Date | Patentee | Title | Type | |
| 658,993 | Oct. 02, 1900 | E.A. Mitchell | Internal-Combustion Engine | internal combustion engines | |
| 1,586,820 | Jun. 01, 1926 | M.J. Goldberg, B.A. McFarlane | Oil Engine Starter | starters | |
| 1,693,546 | Nov. 27, 1928 | C.A. Bjornnson, C.P. Clark | Fuel Injection System | fuel pumps | |
| 1,830,321 | Nov. 03, 1931 | A.W. Hubbell | Internal Combustion Engine | cylinder heads | |