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| Patents for John Harper | |||||
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| Number | Date | Patentee | Title | Type | |
| 566,614 | Aug. 25, 1896 | S. Olsen | Tool For Twisting Electric Wire Sleeve Connections. | wrenches | |
| CA-60,658 | Jul. 20, 1898 | T.J. Fowler | Pipe Wrench | pipe wrenches | |