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US Patent: 306,492
Screw
Improvement in Screws
Patentee:
George W. Jackman (exact or similar names) - Littleton, NH

USPTO Classifications:
411/406

Tool Categories:
hardware : fasteners : screws

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Edward  Jordon
James Hillhouse

Patent Dates:
Applied: Feb. 16, 1884
Granted: Oct. 14, 1884

Patent Pictures:
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Report data errors or omissions to steward Steve Gosselin
Description:
This is the patent for the screw used by Patent306491

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