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FR587901A - Counter-alarm, for example for checking the duration of telephone conversations - Google Patents

Counter-alarm, for example for checking the duration of telephone conversations

Info

Publication number
FR587901A
FR587901A FR587901DA FR587901A FR 587901 A FR587901 A FR 587901A FR 587901D A FR587901D A FR 587901DA FR 587901 A FR587901 A FR 587901A
Authority
FR
France
Prior art keywords
alarm
checking
duration
counter
telephone conversations
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
Jules Schneider Fils
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.)
Kung Champod & Cie
Original Assignee
Kung Champod & Cie
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 Kung Champod & Cie filed Critical Kung Champod & Cie
Application granted granted Critical
Publication of FR587901A publication Critical patent/FR587901A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/10—Metering calls from calling party, i.e. A-party charged for the communication

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
FR587901D 1923-08-24 1923-08-24 Counter-alarm, for example for checking the duration of telephone conversations Expired FR587901A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR587901T 1923-08-24

Publications (1)

Publication Number Publication Date
FR587901A true FR587901A (en) 1925-04-27

Family

ID=8961706

Family Applications (1)

Application Number Title Priority Date Filing Date
FR587901D Expired FR587901A (en) 1923-08-24 1923-08-24 Counter-alarm, for example for checking the duration of telephone conversations

Country Status (1)

Country Link
FR (1) FR587901A (en)

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