FR1274457A - Development of telephone systems - Google Patents

Development of telephone systems

Info

Publication number
FR1274457A
FR1274457A FR834292A FR834292A FR1274457A FR 1274457 A FR1274457 A FR 1274457A FR 834292 A FR834292 A FR 834292A FR 834292 A FR834292 A FR 834292A FR 1274457 A FR1274457 A FR 1274457A
Authority
FR
France
Prior art keywords
development
telephone systems
telephone
systems
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
FR834292A
Other languages
French (fr)
Inventor
Jean Rideau
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
Priority to FR834292A priority Critical patent/FR1274457A/en
Application granted granted Critical
Publication of FR1274457A publication Critical patent/FR1274457A/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
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/62—Constructional arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR834292A 1960-07-28 1960-07-28 Development of telephone systems Expired FR1274457A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR834292A FR1274457A (en) 1960-07-28 1960-07-28 Development of telephone systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR834292A FR1274457A (en) 1960-07-28 1960-07-28 Development of telephone systems

Publications (1)

Publication Number Publication Date
FR1274457A true FR1274457A (en) 1961-10-27

Family

ID=8736429

Family Applications (1)

Application Number Title Priority Date Filing Date
FR834292A Expired FR1274457A (en) 1960-07-28 1960-07-28 Development of telephone systems

Country Status (1)

Country Link
FR (1) FR1274457A (en)

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