NL34119C - - Google Patents

Info

Publication number
NL34119C
NL34119C NL34119DA NL34119C NL 34119 C NL34119 C NL 34119C NL 34119D A NL34119D A NL 34119DA NL 34119 C NL34119 C NL 34119C
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 NL34119C publication Critical patent/NL34119C/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
    • 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
    • H04M17/026—Constructional features

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephone Set Structure (AREA)
NL34119D 1932-03-04 NL34119C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE396626X 1932-03-04

Publications (1)

Publication Number Publication Date
NL34119C true NL34119C (en)

Family

ID=6397071

Family Applications (1)

Application Number Title Priority Date Filing Date
NL34119D NL34119C (en) 1932-03-04

Country Status (2)

Country Link
GB (1) GB396626A (en)
NL (1) NL34119C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2774823A (en) * 1951-12-21 1956-12-18 Maynez Pedro Salinas Selective electrical dialing system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2774823A (en) * 1951-12-21 1956-12-18 Maynez Pedro Salinas Selective electrical dialing system

Also Published As

Publication number Publication date
GB396626A (en) 1933-08-10

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