BE512819A - - Google Patents

Info

Publication number
BE512819A
BE512819A BE512819DA BE512819A BE 512819 A BE512819 A BE 512819A BE 512819D A BE512819D A BE 512819DA BE 512819 A BE512819 A BE 512819A
Authority
BE
Belgium
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 BE512819A publication Critical patent/BE512819A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
BE512819D 1951-07-14 BE512819A (enrdf_load_html_response)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT314171X 1951-07-14

Publications (1)

Publication Number Publication Date
BE512819A true BE512819A (enrdf_load_html_response)

Family

ID=11233607

Family Applications (1)

Application Number Title Priority Date Filing Date
BE512819D BE512819A (enrdf_load_html_response) 1951-07-14

Country Status (3)

Country Link
BE (1) BE512819A (enrdf_load_html_response)
CH (1) CH314171A (enrdf_load_html_response)
FR (1) FR1067890A (enrdf_load_html_response)

Also Published As

Publication number Publication date
FR1067890A (fr) 1954-06-21
CH314171A (it) 1956-05-31

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