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US Patent: 191,811
Improvement in File Holders
Patentee:
William T. Nicholson (exact or similar names) - Providence, RI

USPTO Classifications:
206/509, 407/29.15

Tool Categories:
metalworking tools : files

Assignees:
Nicholson File Co. - Providence, RI

Manufacturer:
Not known to have been produced

Witnesses:
George Fuller
Thomas F. Cosgrove

Patent Dates:
Applied: Mar. 15, 1877
Granted: Jun. 12, 1877

Patent Pictures:
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Report data errors or omissions to steward Russ Allen.
"Vintage Machinery" entry for W. T. Nicholson
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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