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FR573000A - Loudspeaker for telephone device - Google Patents

Loudspeaker for telephone device

Info

Publication number
FR573000A
FR573000A FR573000DA FR573000A FR 573000 A FR573000 A FR 573000A FR 573000D A FR573000D A FR 573000DA FR 573000 A FR573000 A FR 573000A
Authority
FR
France
Prior art keywords
loudspeaker
telephone device
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)
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.)
RADIOTIVE CORP
Original Assignee
RADIOTIVE CORP
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 RADIOTIVE CORP filed Critical RADIOTIVE CORP
Application granted granted Critical
Publication of FR573000A publication Critical patent/FR573000A/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

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
FR573000D 1923-01-31 1923-10-10 Loudspeaker for telephone device Expired FR573000A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US210737XA 1923-01-31 1923-01-31

Publications (1)

Publication Number Publication Date
FR573000A true FR573000A (en) 1924-06-16

Family

ID=21802188

Family Applications (1)

Application Number Title Priority Date Filing Date
FR573000D Expired FR573000A (en) 1923-01-31 1923-10-10 Loudspeaker for telephone device

Country Status (5)

Country Link
US (1) US1564026A (en)
DE (1) DE423874C (en)
FR (1) FR573000A (en)
GB (1) GB210737A (en)
NL (1) NL13948C (en)

Also Published As

Publication number Publication date
US1564026A (en) 1925-12-01
DE423874C (en) 1926-01-13
GB210737A (en) 1925-01-01
NL13948C (en)

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