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US Patent: 5,568
Improvement in electric telegraphs
Patentee:
Charles F. Johnson - Owego, NY

USPTO Classifications:
144/278.1, 178/92, 341/67

Tool Categories:
specialty machines : telegraphy apparatus

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Granted: May 16, 1848

Patent Pictures:
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