FR934311A - Improvements to telephone retransmission devices - Google Patents

Improvements to telephone retransmission devices

Info

Publication number
FR934311A
FR934311A FR934311DA FR934311A FR 934311 A FR934311 A FR 934311A FR 934311D A FR934311D A FR 934311DA FR 934311 A FR934311 A FR 934311A
Authority
FR
France
Prior art keywords
telephone
retransmission devices
retransmission
devices
telephone retransmission
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)
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.)
RADIO ELECTR SOC IND
Original Assignee
RADIO ELECTR SOC IND
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 RADIO ELECTR SOC IND filed Critical RADIO ELECTR SOC IND
Application granted granted Critical
Publication of FR934311A publication Critical patent/FR934311A/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
    • H04M1/02—Constructional features of telephone sets
    • H04M1/21—Combinations with auxiliary equipment, e.g. with clocks or memoranda pads
    • H04M1/215—Combinations with auxiliary equipment, e.g. with clocks or memoranda pads by non-intrusive coupling means, e.g. acoustic couplers
    • H04M1/2155—Acoustic coupling

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR934311D 1946-09-23 1946-09-23 Improvements to telephone retransmission devices Expired FR934311A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR934311T 1946-09-23

Publications (1)

Publication Number Publication Date
FR934311A true FR934311A (en) 1948-05-19

Family

ID=9456051

Family Applications (1)

Application Number Title Priority Date Filing Date
FR934311D Expired FR934311A (en) 1946-09-23 1946-09-23 Improvements to telephone retransmission devices

Country Status (1)

Country Link
FR (1) FR934311A (en)

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