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| Patents for Erhard Schlenker | |||||
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| Number | Date | Patentee | Title | Type | |
| 48,594 | Jul. 04, 1865 | E. Schlenker | Bolt Cutter | bolt cutters | |
| 156,066 | Oct. 20, 1874 | E. Schlenker | Improvement in vises | bench vises | |
| 162,194 | Apr. 20, 1875 | E. Schlenker | Improvement in bolt-threading machines | metal threading machines | |
| 166,730 | Aug. 17, 1875 | E. Schlenker | Improvement in hoisting-machines or elevators | elevators and lifts | |
| 182,230 | Sep. 12, 1876 | E. Schlenker | Improvement in paper-cutting machines | paper cutting machines | |