US Patent: 191,811
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| Improvement in File Holders
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Patentee:
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| William T. Nicholson (exact or similar names) - Providence, RI |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Mar. 15, 1877 |
| Granted: |
Jun. 12, 1877 |
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Russ Allen.
"Vintage Machinery" entry for W. T. Nicholson
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Description: |
| File holder that allows the file to be sprung or bent which is preferred on large surfaces and the convex surface also makes the file less likely to clog or glaze. |
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