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US Patent: 9,688
Machine for pointing and threading screw-blanks
Patentee:
Thomas J. Sloan - New York, NY

USPTO Classifications:
470/68

Tool Categories:

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Charles N. Bamburgh
William H. Bishop

Patent Dates:
Granted: Apr. 26, 1853

Patent Pictures:
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Description:
This patent is of interest because it covers the machine used to manufacture the first modern wood screw, invented by Sloan in 1846; see patents 4,704 and RE107.

According to the 1873 "Subject-matter index of patents for inventions issued by the United States Patent Office", this patent was granted an extension.

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