FR630278A - Electro-telephone resonance box - Google Patents

Electro-telephone resonance box

Info

Publication number
FR630278A
FR630278A FR630278DA FR630278A FR 630278 A FR630278 A FR 630278A FR 630278D A FR630278D A FR 630278DA FR 630278 A FR630278 A FR 630278A
Authority
FR
France
Prior art keywords
electro
telephone
resonance box
resonance
box
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
Peter Grassmann
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 FR630278A publication Critical patent/FR630278A/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
    • H04R11/00—Transducers of moving-armature or moving-core type
    • H04R11/06—Telephone receivers

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR630278D 1926-03-26 1927-03-04 Electro-telephone resonance box Expired FR630278A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE630278X 1926-03-26

Publications (1)

Publication Number Publication Date
FR630278A true FR630278A (en) 1927-11-30

Family

ID=6578802

Family Applications (1)

Application Number Title Priority Date Filing Date
FR630278D Expired FR630278A (en) 1926-03-26 1927-03-04 Electro-telephone resonance box

Country Status (1)

Country Link
FR (1) FR630278A (en)

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