NL34667C - - Google Patents

Info

Publication number
NL34667C
NL34667C NL34667DA NL34667C NL 34667 C NL34667 C NL 34667C NL 34667D A NL34667D A NL 34667DA NL 34667 C NL34667 C NL 34667C
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 NL34667C publication Critical patent/NL34667C/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
    • H04M1/677—Preventing the dialling or sending of predetermined telephone numbers or selected types of telephone numbers, e.g. long distance numbers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M17/00—Prepayment of wireline communication systems, wireless communication systems or telephone systems
    • H04M17/02—Coin-freed or check-freed systems, e.g. mobile- or card-operated phones, public telephones or booths

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephone Set Structure (AREA)
NL34667D 1931-09-01 NL34667C (zh)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL79242D DE640588C (de) 1931-09-01 1931-09-01 Nummernschalter fuer Selbstanschlussfernsprechstellen mit Sperrvorrichtung

Publications (1)

Publication Number Publication Date
NL34667C true NL34667C (zh)

Family

ID=7284584

Family Applications (1)

Application Number Title Priority Date Filing Date
NL34667D NL34667C (zh) 1931-09-01

Country Status (2)

Country Link
DE (2) DE640588C (zh)
NL (1) NL34667C (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19608162A1 (de) * 1996-03-04 1997-09-11 Hoechst Ag Ortho-substituierte Benzoylguanidine, Verfahren zu ihrer Herstellung, ihre Verwendung als Medikament oder Diagnostikum sowie sie enthaltendes Medikament

Also Published As

Publication number Publication date
DE640588C (de) 1937-01-08
DE623828C (zh)

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