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| Patents for St. John Sewing-Machine Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 112,978 | Mar. 21, 1871 | R.H. St. John | Improvement in hinges for sewing-machines | sewing machines | |
| 175,197 | Mar. 21, 1876 | R.H. St. John | Improvement in wringers | washing machines | |