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Danfoss AS
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Danfoss AS
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Priority claimed from DED43786Aexternal-prioritypatent/DE1218529B/de
Application filed by Danfoss ASfiledCriticalDanfoss AS
Priority to FR6719ApriorityCriticalpatent/FR1425164A/fr
Application grantedgrantedCritical
Publication of FR1425164ApublicationCriticalpatent/FR1425164A/fr
H04M1/00—Substation equipment, e.g. for use by subscribers
H04M1/738—Interface circuits for coupling substations to external telephone lines
H04M1/74—Interface circuits for coupling substations to external telephone lines with means for reducing interference; with means for reducing effects due to line faults
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Engineering & Computer Science
(AREA)
Signal Processing
(AREA)
FR6719A1964-03-031965-02-23Perfectionnements apportés aux récepteurs téléphoniques
ExpiredFR1425164A
(fr)