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US Patent: 58,025
Improvement in Files
William T. Nicholson - Providence, RI

USPTO Classifications:

Tool Categories:
metalworking tools : files

Nicholson File Co. - Providence, RI

Nicholson File Co. - Providence, RI

Benj. F. Thurston
George B. Barrows

Patent Dates:
Granted: Sep. 11, 1866

Patent Pictures:
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Machine manufacture of for round or semi-round files with the teeth distinctly formed as when cut by hand but with the rows arranged in wave lines to prevent the file from naturally rotating in use by following the furrows. This patent references his Patent Nos. 42,216 and 42,217 as appropriate methods and tools to produce this file.

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