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US Patent: 228,888
Regulating Electro-Magnetic Motors
Patentee:
William W. Griscom - Philadelphia, PA

USPTO Classifications:
310/68R, 310/77, 318/139, 318/372, 429/110

Tool Categories:
electrical devices : electric motors : motor regulators

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Mar. 29, 1880
Granted: Jun. 15, 1880

Patent Pictures:
USPTO pdf tiff
Google Patents
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"Vintage Machinery" entry for Electro-Dynamic Co.

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