BE423200A - - Google Patents

Info

Publication number
BE423200A
BE423200A BE423200DA BE423200A BE 423200 A BE423200 A BE 423200A BE 423200D A BE423200D A BE 423200DA BE 423200 A BE423200 A BE 423200A
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 BE423200A publication Critical patent/BE423200A/xx

Links

Classifications

    • 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
    • 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)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Transmission Devices (AREA)
  • Telephone Set Structure (AREA)
BE423200D 1936-08-19 BE423200A (c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH500971X 1936-08-19

Publications (1)

Publication Number Publication Date
BE423200A true BE423200A (c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)

Family

ID=4516927

Family Applications (1)

Application Number Title Priority Date Filing Date
BE423200D BE423200A (c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html) 1936-08-19

Country Status (7)

Country Link
US (1) US2216850A (c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)
BE (1) BE423200A (c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)
CH (1) CH195491A (c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)
DE (1) DE690679C (c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)
FR (1) FR825777A (c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)
GB (1) GB500971A (c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)
NL (1) NL48597C (c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3284578A (en) * 1963-02-11 1966-11-08 Earl R Evans Direct-dialing long-distance telephone systems
US3358087A (en) * 1964-05-21 1967-12-12 Western Electric Co Telephone instrument dialing control device

Also Published As

Publication number Publication date
NL48597C (c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)
DE690679C (de) 1940-05-04
CH195491A (fr) 1938-01-31
FR825777A (fr) 1938-03-14
US2216850A (en) 1940-10-08
GB500971A (en) 1939-02-20

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