US Patent: 495,689
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| Oil-well-drilling apparatus
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Patentee:
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| Josiah Barrett (exact or similar names) - Allegheny, PA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jun. 10, 1892 |
| Granted: |
Apr. 18, 1893 |
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Jeff Joslin
Vintage Machinery entry for Duff Mfg. Co.
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Description: |
| The inventor was superintendent of Duff Mfg. Co. Barrett had a sideline in jacks and wrenches related to oil drilling. These products were made, and branded, by Duff Mfg.. We do not know if this particular patent was ever manufactured. |
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