US Patent: 543,625
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| Machine for boring joists for electric wiring
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Patentees:
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| Robert H. Henderson (exact or similar names) - Chicago, IL |
| John G. Henderson (exact or similar names) - Chicago, IL |
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Patent Dates:
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| Applied: |
Oct. 03, 1894 |
| Granted: |
Jul. 30, 1895 |
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Patent Pictures:
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1 | 2
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Jeff Joslin
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Description: |
| "Henderson's Patent Joint Boring Machine" and the similar "Henderson's Patent Universal Hand Boring Machine" were sold by Chicago hardware retailer H. Channon Co. We do not know for certain who the manufacturer was but it seems most likely that it was the inventors themselves. |
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