CH324354A - Device cooperating with a common telephone set for transmitting acoustic signals to the calling subscriber - Google Patents

Device cooperating with a common telephone set for transmitting acoustic signals to the calling subscriber

Info

Publication number
CH324354A
CH324354A CH324354DA CH324354A CH 324354 A CH324354 A CH 324354A CH 324354D A CH324354D A CH 324354DA CH 324354 A CH324354 A CH 324354A
Authority
CH
Switzerland
Prior art keywords
telephone set
acoustic signals
calling subscriber
device cooperating
transmitting acoustic
Prior art date
Application number
Other languages
Italian (it)
Inventor
Codini Severino
Original Assignee
Codini Severino
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 Codini Severino filed Critical Codini Severino
Publication of CH324354A publication Critical patent/CH324354A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
CH324354D 1953-07-28 1954-04-05 Device cooperating with a common telephone set for transmitting acoustic signals to the calling subscriber CH324354A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT324354X 1953-07-28
IT220953X 1953-09-22

Publications (1)

Publication Number Publication Date
CH324354A true CH324354A (en) 1957-09-15

Family

ID=26328096

Family Applications (1)

Application Number Title Priority Date Filing Date
CH324354D CH324354A (en) 1953-07-28 1954-04-05 Device cooperating with a common telephone set for transmitting acoustic signals to the calling subscriber

Country Status (1)

Country Link
CH (1) CH324354A (en)

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