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US Patent: 357,584
Tool for Closing Mainspring Barrels
Patentee:
William Wallace Dudley - Waltham, Middlesex County, MA

USPTO Classifications:
29/232, 29/267, 29/268

Tool Categories:
trade specific : watchmaker

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Oct. 16, 1886
Granted: Feb. 15, 1887

Patent Pictures:
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Description:
Patented in Canada, 25 Oct 1886, #25,203

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