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| All Patents in class 91/43 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,036,842 | Aug. 27, 1912 | C.L. Heisler | Valve Reversing Gear | steam engine valve gear | |
| 1,698,604 | Jan. 08, 1929 | R. Moore | Floating-lever brake engine | elevators and lifts | |