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| Patents for Jacob Kiefer | |||||
| Number | Date | Patentee | Title | Type | |
| 31,937 | Apr. 02, 1861 | J. Kiefer, G. Zchech | Shingle-machine | shingle machines | |
| 641,019 | Jan. 09, 1900 | S.S. Lawrence, J. Kiefer | Shoemaker's Tool | cobbler | |