Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lorenz C AgfiledCriticalLorenz C Ag
Application grantedgrantedCritical
Publication of DK59066CpublicationCriticalpatent/DK59066C/en
DK59066D1938-07-301939-07-26
Signal receiver at Telephone systems, in which Signals are transmitted at an AC current within the Voice Frequency band.
DK59066C
(en)