FR793466A - Improvements to automatic telephone call dials - Google Patents

Improvements to automatic telephone call dials

Info

Publication number
FR793466A
FR793466A FR793466DA FR793466A FR 793466 A FR793466 A FR 793466A FR 793466D A FR793466D A FR 793466DA FR 793466 A FR793466 A FR 793466A
Authority
FR
France
Prior art keywords
telephone call
automatic telephone
call dials
dials
automatic
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
COMPTEURS DE VOITURES SOC GEN
Original Assignee
COMPTEURS DE VOITURES SOC GEN
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.)
Filing date
Publication date
Application filed by COMPTEURS DE VOITURES SOC GEN filed Critical COMPTEURS DE VOITURES SOC GEN
Application granted granted Critical
Publication of FR793466A publication Critical patent/FR793466A/en
Expired legal-status Critical Current

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)
FR793466D 1936-07-22 1935-07-27 Improvements to automatic telephone call dials Expired FR793466A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR47525T 1936-07-22

Publications (1)

Publication Number Publication Date
FR793466A true FR793466A (en) 1936-01-25

Family

ID=8683000

Family Applications (2)

Application Number Title Priority Date Filing Date
FR793466D Expired FR793466A (en) 1936-07-22 1935-07-27 Improvements to automatic telephone call dials
FR47525D Expired FR47525E (en) 1936-07-22 1936-07-22 Improvements to automatic telephone call dials

Family Applications After (1)

Application Number Title Priority Date Filing Date
FR47525D Expired FR47525E (en) 1936-07-22 1936-07-22 Improvements to automatic telephone call dials

Country Status (2)

Country Link
BE (1) BE416678A (en)
FR (2) FR793466A (en)

Also Published As

Publication number Publication date
FR47525E (en) 1937-05-24
BE416678A (en)

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