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US Patent: 78,230
Elliptic Spring
Patentee:
Joseph Palmer (exact or similar names) - Concord, Merrimack County, NH

USPTO Classifications:
72/400, 72/450

Tool Categories:
metalworking machines : forging machines : forging dies

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Granted: May 26, 1868

Patent Pictures:
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