FR756543A - Automatic phone device lock device - Google Patents

Automatic phone device lock device

Info

Publication number
FR756543A
FR756543A FR756543DA FR756543A FR 756543 A FR756543 A FR 756543A FR 756543D A FR756543D A FR 756543DA FR 756543 A FR756543 A FR 756543A
Authority
FR
France
Prior art keywords
automatic phone
lock device
lock
phone device
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)
Inventor
Maxime Baze
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 FR756543A publication Critical patent/FR756543A/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)
FR756543D 1932-12-14 1932-09-09 Automatic phone device lock device Expired FR756543A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR43217T 1932-12-14

Publications (1)

Publication Number Publication Date
FR756543A true FR756543A (en) 1933-12-11

Family

ID=8679210

Family Applications (2)

Application Number Title Priority Date Filing Date
FR756543D Expired FR756543A (en) 1932-12-14 1932-09-09 Automatic phone device lock device
FR43217D Expired FR43217E (en) 1932-12-14 1932-12-14 Automatic phone device lock device

Family Applications After (1)

Application Number Title Priority Date Filing Date
FR43217D Expired FR43217E (en) 1932-12-14 1932-12-14 Automatic phone device lock device

Country Status (1)

Country Link
FR (2) FR756543A (en)

Also Published As

Publication number Publication date
FR43217E (en) 1934-04-06

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