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| All Patents in class 24/694 | |||||
| Number | Date | Patentee | Title | Type | |
| 49,634 | Aug. 29, 1865 | C.C. Kroh | Improvement in Curtain-Knobs | auxiliary wrenches | |
| RE4,019 | Jun. 07, 1870 | C.Z. Kroh | Improvement in Curtain-Knobs | ||