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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 Jordan James Hillhouse	Patent Dates: Applied: Feb. 16, 1884 Granted: Oct. 14, 1884 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Steve Gosselin
Description: This is the patent for the screw used by Patent306491

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