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| Patents for Fredrick Jonas | |||||
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| Number | Date | Patentee | Title | Type | |
| 137,373 | Apr. 01, 1873 | F. Jonas | Adjustable Countersink Bit-Assembly | countersinks | |
| 144,618 | Nov. 18, 1873 | F. Jonas | Hub-Boring Machine | wheelwright | |