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Priority to DE1966W0036644priorityCriticalpatent/DE1936266U/en
Publication of DE1936266UpublicationCriticalpatent/DE1936266U/en
TRANSLATOR ALLOWING THE EXCHANGE OF INFORMATION BETWEEN A TELECOMMUNICATIONS NETWORK IN MODULATION BY CODE PULSES AND A NETWORK IN DIFFERENTIAL MODULATION.
Procedure for obtaining secret communication on the "Train Dispatching" telephone lines using the selective call system, western electric or similar system and, in general, all step-by-step selection systems.