FR785903A - Automatic telephone disc lock - Google Patents

Automatic telephone disc lock

Info

Publication number
FR785903A
FR785903A FR785903DA FR785903A FR 785903 A FR785903 A FR 785903A FR 785903D A FR785903D A FR 785903DA FR 785903 A FR785903 A FR 785903A
Authority
FR
France
Prior art keywords
automatic telephone
disc lock
disc
lock
telephone
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
Hauzy Maurice
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 FR785903A publication Critical patent/FR785903A/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)
FR785903D 1934-05-11 1934-05-11 Automatic telephone disc lock Expired FR785903A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR785903T 1934-05-11

Publications (1)

Publication Number Publication Date
FR785903A true FR785903A (en) 1935-08-22

Family

ID=9218088

Family Applications (1)

Application Number Title Priority Date Filing Date
FR785903D Expired FR785903A (en) 1934-05-11 1934-05-11 Automatic telephone disc lock

Country Status (1)

Country Link
FR (1) FR785903A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2469806A (en) * 1947-06-07 1949-05-10 Zion Bernard Dial telephone lock

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2469806A (en) * 1947-06-07 1949-05-10 Zion Bernard Dial telephone lock

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