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Application filed by Jan Arent Schoenheyder V DeursfiledCriticalJan Arent Schoenheyder V Deurs
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Publication of DK45709CpublicationCriticalpatent/DK45709C/da
DK45709D1930-02-011930-02-01Anordning ved elektriske Maaleapparater, f. Eks. Kompensationsapparater til Maaling af Jævnstrømme eller Jævnspændinger.
DK45709C
(da)