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FR37761E - Improvements to telephone receivers for loudspeakers - Google Patents

Improvements to telephone receivers for loudspeakers

Info

Publication number
FR37761E
FR37761E FR37761DA FR37761E FR 37761 E FR37761 E FR 37761E FR 37761D A FR37761D A FR 37761DA FR 37761 E FR37761 E FR 37761E
Authority
FR
France
Prior art keywords
loudspeakers
telephone receivers
receivers
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
Felipe Saldana
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 FR37761E publication Critical patent/FR37761E/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)
FR37761D 1929-12-10 1929-12-10 Improvements to telephone receivers for loudspeakers Expired FR37761E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR37764T 1929-12-10

Publications (1)

Publication Number Publication Date
FR37761E true FR37761E (en) 1931-01-17

Family

ID=8674353

Family Applications (3)

Application Number Title Priority Date Filing Date
FR679855D Expired FR679855A (en) 1929-12-10 1929-08-03 Improvements to telephone receivers for loudspeakers
FR37761D Expired FR37761E (en) 1929-12-10 1929-12-10 Improvements to telephone receivers for loudspeakers
FR37764D Expired FR37764E (en) 1929-12-10 1929-12-10 Improvements in typewriters and calculators

Family Applications Before (1)

Application Number Title Priority Date Filing Date
FR679855D Expired FR679855A (en) 1929-12-10 1929-08-03 Improvements to telephone receivers for loudspeakers

Family Applications After (1)

Application Number Title Priority Date Filing Date
FR37764D Expired FR37764E (en) 1929-12-10 1929-12-10 Improvements in typewriters and calculators

Country Status (1)

Country Link
FR (3) FR679855A (en)

Also Published As

Publication number Publication date
FR37764E (en) 1931-01-17
FR679855A (en) 1930-04-18

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