US Patent: 265,975
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| Forming Teeth Upon File Banks and Apparatus Therefor
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Patentee:
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| William T. Nicholson (exact or similar names) - Providence, RI |
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Patent Dates:
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| Applied: |
Mar. 03, 1882 |
| Granted: |
Oct. 17, 1882 |
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Patent Pictures:
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1 | 2
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Russ Allen.
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Description: |
| Used for making fine files with seventy-five teeth to the inch and finer where chiseling cannot be used. A grooved or threaded bar of hardened steel is rubbed under pressure over the file blank. |
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