NL44301C - - Google Patents

Info

Publication number
NL44301C
NL44301C NL44301DA NL44301C NL 44301 C NL44301 C NL 44301C NL 44301D A NL44301D A NL 44301DA NL 44301 C NL44301 C NL 44301C
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 NL44301C publication Critical patent/NL44301C/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
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07F—COIN-FREED OR LIKE APPARATUS
    • G07F5/00—Coin-actuated mechanisms; Interlocks
    • 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)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Prepayment Telephone Systems (AREA)
NL44301D 1935-11-16 NL44301C (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH485117X 1935-11-16

Publications (1)

Publication Number Publication Date
NL44301C true NL44301C (enrdf_load_stackoverflow)

Family

ID=4516424

Family Applications (1)

Application Number Title Priority Date Filing Date
NL44301D NL44301C (enrdf_load_stackoverflow) 1935-11-16

Country Status (5)

Country Link
CH (1) CH186683A (enrdf_load_stackoverflow)
DE (1) DE665859C (enrdf_load_stackoverflow)
FR (1) FR813539A (enrdf_load_stackoverflow)
GB (1) GB485117A (enrdf_load_stackoverflow)
NL (1) NL44301C (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE857216C (de) * 1942-12-07 1952-11-27 Siemens Ag Schaltungsanordnung in Fernsprechanlagen mit Muenzkassierern fuer Netzgruppenverkehr

Also Published As

Publication number Publication date
GB485117A (en) 1938-05-16
DE665859C (de) 1938-10-07
CH186683A (de) 1936-09-30
FR813539A (fr) 1937-06-03

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