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| Patents for Hill Mfg. Co. | |||||
| Number | Date | Patentee | Title | Type | |
| 409,324 | Aug. 20, 1889 | C.C. Hill | Perforating-stamp | office worker | |
| 433,003 | Jul. 29, 1890 | C.C. Hill | Perforating-stamp | office worker | |