NL31051C - - Google Patents

Info

Publication number
NL31051C
NL31051C NL31051DA NL31051C NL 31051 C NL31051 C NL 31051C NL 31051D A NL31051D A NL 31051DA NL 31051 C NL31051 C NL 31051C
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 NL31051C publication Critical patent/NL31051C/xx

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M3/00Automatic or semi-automatic exchanges
    • H04M3/40Applications of speech amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Amplifiers (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
NL31051D 1930-01-09 NL31051C (https=)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE622343T 1930-01-09

Publications (1)

Publication Number Publication Date
NL31051C true NL31051C (https=)

Family

ID=34812906

Family Applications (1)

Application Number Title Priority Date Filing Date
NL31051D NL31051C (https=) 1930-01-09

Country Status (4)

Country Link
DE (1) DE622343C (https=)
FR (1) FR708948A (https=)
GB (1) GB367982A (https=)
NL (1) NL31051C (https=)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE865913C (de) * 1941-04-19 1953-02-05 Aeg Wechselsprech-Lautsprecheranlage
DE742659C (de) * 1941-11-26 1944-11-17 Siemens Ag Schaltungsanordnung fuer Fernmeldeanlagen, insbesondere Fernsprechanlagen
DE1019217B (de) * 1953-07-27 1957-11-07 Electroacustic Gmbh Elektroakustische UEbertragungsanlage
DE1001713B (de) * 1953-12-07 1957-01-31 Telefonbau & Normalzeit Gmbh Telefonteilnehmerstation mit tastengesteuerter Frequenzwahl und einem Schichttransistoren enthaltenden Mikrophonverstaerker
DE975971C (de) * 1955-04-05 1962-12-27 Angelika Kunckel Tragbarer Fernsprechapparat mit Ortsbatterie
DE1037518B (de) * 1955-11-30 1958-08-28 Siemens Ag Verfahren zur UEberpruefung von UEbertragungsanlagen, insbesondere zur Fernmessung der Klirrdaempfung von Unterwegsverstaerkern in Traegerfrequenzsystemen
DE1034701B (de) * 1956-09-28 1958-07-24 Siemens Ag Schaltungsanordnung fuer Teilnehmerstellen in Fernmelde-, insbesondere Fernsprechanlagen, mit Tastaturwahl
DE1207494B (de) * 1958-10-27 1965-12-23 Gen Radio Co Eichgeraet zum Einstellen des Verstaerkungsgrades elektrischer Verstaerker, insbesondere fuer Schallstaerkenmessgeraete
DE1131278B (de) * 1959-12-30 1962-06-14 Siemens Ag UEberwachungsanordnung fuer Fernmelde-, insbesondere Fernsprechanlagen
DE1512811C3 (de) * 1967-04-27 1984-08-02 ANT Nachrichtentechnik GmbH, 7150 Backnang Schaltungsanordnung für die Prüfung der sprechstelleneigenen Einrichtungen in Sprechanlagen

Also Published As

Publication number Publication date
GB367982A (en) 1932-03-03
FR708948A (fr) 1931-07-30
DE622343C (de) 1935-11-27

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