FR569539A - Improvements to receiving telephone devices - Google Patents

Improvements to receiving telephone devices

Info

Publication number
FR569539A
FR569539A FR569539DA FR569539A FR 569539 A FR569539 A FR 569539A FR 569539D A FR569539D A FR 569539DA FR 569539 A FR569539 A FR 569539A
Authority
FR
France
Prior art keywords
telephone devices
receiving telephone
receiving
devices
telephone
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
Joseph Bethenod
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 FR569539A publication Critical patent/FR569539A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/02—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with tubes only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
    • H04R3/08—Circuits for transducers, loudspeakers or microphones for correcting frequency response of electromagnetic transducers

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Electromagnetism (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR569539D 1923-03-20 1922-10-28 Improvements to receiving telephone devices Expired FR569539A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR28302T 1923-03-20

Publications (1)

Publication Number Publication Date
FR569539A true FR569539A (en) 1924-04-14

Family

ID=8666493

Family Applications (5)

Application Number Title Priority Date Filing Date
FR569539D Expired FR569539A (en) 1923-03-20 1922-10-28 Improvements to receiving telephone devices
FR570201D Expired FR570201A (en) 1923-03-20 1922-11-14 Improvements to amplifying devices applicable in particular to corded or wireless telephony
FR27359D Expired FR27359E (en) 1923-03-20 1922-12-05 Improvements to receiving telephone devices
FR27790D Expired FR27790E (en) 1923-03-20 1923-02-26 Improvements to receiving telephone devices
FR28302D Expired FR28302E (en) 1923-03-20 1923-03-20 Improvements to amplifying devices applicable in particular to corded or wireless telephony

Family Applications After (4)

Application Number Title Priority Date Filing Date
FR570201D Expired FR570201A (en) 1923-03-20 1922-11-14 Improvements to amplifying devices applicable in particular to corded or wireless telephony
FR27359D Expired FR27359E (en) 1923-03-20 1922-12-05 Improvements to receiving telephone devices
FR27790D Expired FR27790E (en) 1923-03-20 1923-02-26 Improvements to receiving telephone devices
FR28302D Expired FR28302E (en) 1923-03-20 1923-03-20 Improvements to amplifying devices applicable in particular to corded or wireless telephony

Country Status (1)

Country Link
FR (5) FR569539A (en)

Also Published As

Publication number Publication date
FR27790E (en) 1924-08-18
FR28302E (en) 1925-02-16
FR27359E (en) 1924-06-24
FR570201A (en) 1924-04-25

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