FR817259A - Improvements to telephone devices - Google Patents

Improvements to telephone devices

Info

Publication number
FR817259A
FR817259A FR817259DA FR817259A FR 817259 A FR817259 A FR 817259A FR 817259D A FR817259D A FR 817259DA FR 817259 A FR817259 A FR 817259A
Authority
FR
France
Prior art keywords
telephone devices
telephone
devices
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
Julien Becognee
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 FR817259A publication Critical patent/FR817259A/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
    • H04M1/64—Automatic arrangements for answering calls; Automatic arrangements for recording messages for absent subscribers; Arrangements for recording conversations
    • H04M1/65—Recording arrangements for recording a message from the calling party

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR817259D 1936-05-08 1936-05-08 Improvements to telephone devices Expired FR817259A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR817259T 1936-05-08

Publications (1)

Publication Number Publication Date
FR817259A true FR817259A (en) 1937-08-31

Family

ID=9268254

Family Applications (1)

Application Number Title Priority Date Filing Date
FR817259D Expired FR817259A (en) 1936-05-08 1936-05-08 Improvements to telephone devices

Country Status (1)

Country Link
FR (1) FR817259A (en)

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