NL247967A - - Google Patents

Info

Publication number
NL247967A
NL247967A NL247967DA NL247967A NL 247967 A NL247967 A NL 247967A NL 247967D A NL247967D A NL 247967DA NL 247967 A NL247967 A NL 247967A
Authority
NL
Netherlands
Application number
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Publication of NL247967A publication Critical patent/NL247967A/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
NL247967D 1959-02-02 NL247967A (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR785584A FR1227286A (fr) 1959-02-02 1959-02-02 Amplificateur duplex et son adaptation sur ligne de réseau téléphonique public

Publications (1)

Publication Number Publication Date
NL247967A true NL247967A (enrdf_load_stackoverflow)

Family

ID=8710760

Family Applications (1)

Application Number Title Priority Date Filing Date
NL247967D NL247967A (enrdf_load_stackoverflow) 1959-02-02

Country Status (4)

Country Link
BE (1) BE587075A (enrdf_load_stackoverflow)
DE (1) DE1132598B (enrdf_load_stackoverflow)
FR (1) FR1227286A (enrdf_load_stackoverflow)
NL (1) NL247967A (enrdf_load_stackoverflow)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE882420C (de) * 1938-04-12 1953-07-09 Siemens Ag Schaltungsanordnung fuer Rueckkopplungssperren in Lautfernsprechanlagen
BE560458A (enrdf_load_stackoverflow) * 1954-02-08

Also Published As

Publication number Publication date
BE587075A (fr) 1960-05-16
FR1227286A (fr) 1960-08-19
DE1132598B (de) 1962-07-05

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