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Application filed by Philips NvfiledCriticalPhilips Nv
Application grantedgrantedCritical
Publication of DK68889CpublicationCriticalpatent/DK68889C/da
DK90143A1942-03-131943-03-26Kobling til frembringelse af pludselige strøm- eller spændingsændringer eller både strøm- og spændingsændringer.
DK68889C
(da)