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| All Patents in class 91/344 | |||||
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| Number | Date | Patentee | Title | Type | |
| 168,215 | Sep. 28, 1875 | H.J. Behrens | Improvement in valve-gears | steam engine valve gear | |
| 178,714 | Jun. 13, 1876 | H.J. Behrens | Improvement in valve-gears for direct-acting engines | steam engine valve gear | |
| 3,016,016 | Jan. 09, 1962 | H. Horlacher | Reciprocating Pump | reciprocating pumps | |