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Telefonaktiebolaget LM Ericsson AB
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Telefonaktiebolaget LM Ericsson AB
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Application filed by Telefonaktiebolaget LM Ericsson ABfiledCriticalTelefonaktiebolaget LM Ericsson AB
Application grantedgrantedCritical
Publication of FR682965ApublicationCriticalpatent/FR682965A/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)
FR682965D1929-03-071929-10-09Perfectionnements apportés aux circuits pour téléphones automatiques
ExpiredFR682965A
(fr)