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US Patent: 38,141
Improvement in Screws
Patentee:
J. A. Ayres (exact or similar names) - Hartford, CT

USPTO Classifications:
411/406

Tool Categories:
hardware : fasteners : screws

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Charles Whittlesey
J. W. Coombs
Patent Dates:
Granted: Apr. 14, 1863

Patent Pictures:
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Report data errors or omissions to steward Steve Gosselin
Description:
Screw to be used with Patent, 39206

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