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US Patent: 430,094
Tool for Turning Dynamo Commutators
Patentee:
Allen Dunton Spencer (exact or similar names) - Baltimore, MD

USPTO Classifications:
407/29.1, 451/557

Tool Categories:
specialty tools : commutator truing tools

Assignees:
Allen Dunton Spencer - Baltimore, MD
Richard M. Wallace - Baltimore, MD

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Feb. 15, 1890
Granted: Jun. 10, 1890

Patent Pictures:
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