FR1013279A - Transmitter-receiver device with electro-acoustic connection with a telephone network - Google Patents

Transmitter-receiver device with electro-acoustic connection with a telephone network

Info

Publication number
FR1013279A
FR1013279A FR1013279DA FR1013279A FR 1013279 A FR1013279 A FR 1013279A FR 1013279D A FR1013279D A FR 1013279DA FR 1013279 A FR1013279 A FR 1013279A
Authority
FR
France
Prior art keywords
electro
transmitter
telephone network
receiver device
acoustic connection
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
Alain Leroy
Roger Denes
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.)
APPLIC IND RADIO TECH SOC D
Original Assignee
APPLIC IND RADIO TECH SOC D
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 APPLIC IND RADIO TECH SOC D filed Critical APPLIC IND RADIO TECH SOC D
Application granted granted Critical
Publication of FR1013279A publication Critical patent/FR1013279A/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)
FR1013279D 1950-02-25 1950-02-25 Transmitter-receiver device with electro-acoustic connection with a telephone network Expired FR1013279A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1013279T 1950-02-25

Publications (1)

Publication Number Publication Date
FR1013279A true FR1013279A (en) 1952-07-25

Family

ID=9571522

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1013279D Expired FR1013279A (en) 1950-02-25 1950-02-25 Transmitter-receiver device with electro-acoustic connection with a telephone network

Country Status (1)

Country Link
FR (1) FR1013279A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3092688A (en) * 1960-09-21 1963-06-04 Rector Joseph Combined telephone amplifier and radio receiver
FR2023136A1 (en) * 1968-11-12 1970-08-07 Magnavox Co
US3725584A (en) * 1970-12-30 1973-04-03 Ibm Acoustic coupler
US4246444A (en) * 1978-11-30 1981-01-20 Anderson Jacobson, Inc. Telephone handset acoustic coupling cup
US4268721A (en) * 1977-05-02 1981-05-19 Sri International Portable telephone communication device for the hearing impaired

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3092688A (en) * 1960-09-21 1963-06-04 Rector Joseph Combined telephone amplifier and radio receiver
FR2023136A1 (en) * 1968-11-12 1970-08-07 Magnavox Co
US3725584A (en) * 1970-12-30 1973-04-03 Ibm Acoustic coupler
US4268721A (en) * 1977-05-02 1981-05-19 Sri International Portable telephone communication device for the hearing impaired
US4246444A (en) * 1978-11-30 1981-01-20 Anderson Jacobson, Inc. Telephone handset acoustic coupling cup

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