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US Patent: 503,038
Regulation of alternating-current motors
Patentee: Michael von Dolivo-Dobrowolsky (exact or similar names) - Berlin, Germany USPTO Classifications: 318/829 Tool Categories: electrical devices : electric motors : induction motors Assignees: Allgemeine Elektricitäts-Gesselschaft - Berlin, Germany Manufacturer: Not known to have been produced Witnesses: Simon Roos Oskar von Goeben	Patent Dates: Applied: Dec. 23, 1890 Granted: Aug. 08, 1893 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin
Description: This patent is equivalent to French patent FR-210,221, British patent GB-189,120,425, and others; see the patent specification for a complete list.

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