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Individual
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Priority to FR7121232ApriorityCriticalpatent/FR2140898A5/fr
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Publication of FR2140898A5publicationCriticalpatent/FR2140898A5/fr
H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
H04M11/04—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems