AT171987B -
Circuit arrangement for telephone systems, in particular for company connections with optional calling by post-dialing a digit
- Google Patents
Circuit arrangement for telephone systems, in particular for company connections with optional calling by post-dialing a digit
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Publication number
AT171987B
AT171987BAT171987DAAT171987BAT 171987 BAT171987 BAT 171987BAT 171987D AAT171987D AAT 171987DAAT 171987 BAT171987 BAT 171987B
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 Schrack Elektrizitaets Ag EfiledCriticalSchrack Elektrizitaets Ag E
Application grantedgrantedCritical
Publication of AT171987BpublicationCriticalpatent/AT171987B/en
AT171987D1951-01-311951-01-31
Circuit arrangement for telephone systems, in particular for company connections with optional calling by post-dialing a digit
AT171987B
(en)