NL39531C - - Google Patents

Info

Publication number
NL39531C
NL39531C NL39531DA NL39531C NL 39531 C NL39531 C NL 39531C NL 39531D A NL39531D A NL 39531DA NL 39531 C NL39531 C NL 39531C
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 NL39531C publication Critical patent/NL39531C/xx

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B3/00Line transmission systems
    • H04B3/02Details
    • H04B3/04Control of transmission; Equalising
    • 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)
  • Computer Networks & Wireless Communication (AREA)
  • Alarm Systems (AREA)
NL39531D 1930-12-09 NL39531C (en:Method)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE620251T 1930-12-09

Publications (1)

Publication Number Publication Date
NL39531C true NL39531C (en:Method)

Family

ID=34812903

Family Applications (2)

Application Number Title Priority Date Filing Date
NL39531D NL39531C (en:Method) 1930-12-09
NL40819D NL40819C (en:Method) 1930-12-09

Family Applications After (1)

Application Number Title Priority Date Filing Date
NL40819D NL40819C (en:Method) 1930-12-09

Country Status (3)

Country Link
DE (1) DE620251C (en:Method)
FR (2) FR727923A (en:Method)
NL (2) NL40819C (en:Method)

Also Published As

Publication number Publication date
FR727923A (fr) 1932-06-27
FR42678E (fr) 1933-09-01
NL40819C (en:Method)
DE620251C (de) 1935-10-17

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