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| All Patents in class 74/538 | |||||
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| Number | Date | Patentee | Title | Type | |
| 588,877 | Aug. 24, 1897 | C. Quast | Traction Engine | steam traction engines | |
| 709,807 | Sep. 23, 1902 | M.J. Todd | Lever Mechanism | harrows | |
| 1,140,743 | May 25, 1915 | C.L. Heisler | Reverse Lever Latching Mechanism | steam engine valve gear | |