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| All Patents in class 74/8 | |||||
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| Number | Date | Patentee | Title | Type | |
| 446,992 | Feb. 24, 1891 | C.M. Farrar | Reversing Gear for Steam Engines | steam engine valve gear | |
| 657,055 | Aug. 28, 1900 | C.H. Blomstrom | Starting Mechanism for Explosive-Engines | starters | |
| 2,692,505 | Oct. 26, 1954 | F.G. Hobart, T.W. Ashcroft | Starter Mechanism for Internal Combustion Engines | starters | |