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US Patent: 540,153
Apparatus for determining differences between phases of two electric alternating currents
Patentee:
Michael von Dolivo-Dobrowolsky (exact or similar names) - Berlin, Germany

USPTO Classifications:
324/90

Tool Categories:
electrical devices : electrical measuring apparatus

Assignees:
Allgemeine Elektricitäts-Gesselschaft - Berlin, Germany

Manufacturer:
Not known to have been produced

Witnesses:
Anton Weber
Simon Roos
Patent Dates:
Applied: Oct. 27, 1893
Granted: May 28, 1895

Patent Pictures:
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