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Priority claimed from US383202Aexternal-prioritypatent/US3408626A/en
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Publication of NL6509179ApublicationCriticalpatent/NL6509179A/xx
G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
G08C25/00—Arrangements for preventing or correcting errors; Monitoring arrangements
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04Q—SELECTING
H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom