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US Patent: 238,631
Dynamo or Magneto-Electric Machine
Patentee:
Charles E. Ball (exact or similar names) - Philadelphia, PA

USPTO Classifications:
105/118, 310/178, 318/76, 74/5.37

Tool Categories:
electrical devices : electric generators

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Nov. 18, 1880
Granted: Mar. 08, 1881

Patent Pictures:
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