FR416083A - Coupling device for phones - Google Patents

Coupling device for phones

Info

Publication number
FR416083A
FR416083A FR416083DA FR416083A FR 416083 A FR416083 A FR 416083A FR 416083D A FR416083D A FR 416083DA FR 416083 A FR416083 A FR 416083A
Authority
FR
France
Prior art keywords
phones
coupling device
coupling
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
Gotthilf Ansgarius Betulander
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR416083A publication Critical patent/FR416083A/en
Expired legal-status Critical Current

Links

Classifications

    • 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

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR416083D 1909-05-19 1910-05-18 Coupling device for phones Expired FR416083A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE416083X 1909-05-19

Publications (1)

Publication Number Publication Date
FR416083A true FR416083A (en) 1910-10-11

Family

ID=1459616

Family Applications (1)

Application Number Title Priority Date Filing Date
FR416083D Expired FR416083A (en) 1909-05-19 1910-05-18 Coupling device for phones

Country Status (1)

Country Link
FR (1) FR416083A (en)

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