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Patent Number Title Assignee Status Filing Date Grant Date Expires Remaining Claims Actions
DE647468C Method for remote display or remote transmission of electrical currents of variable intensity, in particular for the purposes of electrical image transmission, electrical sound transmission and the like. like BERTHOLD FREUND DIPL ING Expired / Lapsed 1925-03-11 1937-07-05 1945-03-11 0.0 yrs 0