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FR985783A - Locking device for telephone device - Google Patents

Locking device for telephone device

Info

Publication number
FR985783A
FR985783A FR985783DA FR985783A FR 985783 A FR985783 A FR 985783A FR 985783D A FR985783D A FR 985783DA FR 985783 A FR985783 A FR 985783A
Authority
FR
France
Prior art keywords
telephone
locking
locking device
telephone device
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)
Inventor
Andre-Louis-Marie Delacour
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 filed Critical
Application granted granted Critical
Publication of FR985783A publication Critical patent/FR985783A/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
    • H04M1/667—Preventing unauthorised calls from a telephone set

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
FR985783D 1949-05-07 1949-05-07 Locking device for telephone device Expired FR985783A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR985783T 1949-05-07

Publications (1)

Publication Number Publication Date
FR985783A true FR985783A (en) 1951-07-23

Family

ID=9537630

Family Applications (1)

Application Number Title Priority Date Filing Date
FR985783D Expired FR985783A (en) 1949-05-07 1949-05-07 Locking device for telephone device

Country Status (1)

Country Link
FR (1) FR985783A (en)

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