FR343215A - Improvements to telephone receivers - Google Patents

Improvements to telephone receivers

Info

Publication number
FR343215A
FR343215A FR343215DA FR343215A FR 343215 A FR343215 A FR 343215A FR 343215D A FR343215D A FR 343215DA FR 343215 A FR343215 A FR 343215A
Authority
FR
France
Prior art keywords
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
Maurice-Arthur-Octave-Thomas Bourdon De Launay
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.)
MAURICE ARTHUR OCTAVE THOMAS B
Original Assignee
MAURICE ARTHUR OCTAVE THOMAS B
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 MAURICE ARTHUR OCTAVE THOMAS B filed Critical MAURICE ARTHUR OCTAVE THOMAS B
Application granted granted Critical
Publication of FR343215A publication Critical patent/FR343215A/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
    • H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR343215D 1904-05-09 1904-05-09 Improvements to telephone receivers Expired FR343215A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR343215T 1904-05-09

Publications (1)

Publication Number Publication Date
FR343215A true FR343215A (en) 1904-09-28

Family

ID=1392171

Family Applications (1)

Application Number Title Priority Date Filing Date
FR343215D Expired FR343215A (en) 1904-05-09 1904-05-09 Improvements to telephone receivers

Country Status (1)

Country Link
FR (1) FR343215A (en)

Similar Documents

Publication Publication Date Title
FR343215A (en) Improvements to telephone receivers
FR353468A (en) Improvements to telephone auto-switches
FR358981A (en) Improvements to corsets
FR339421A (en) Improvements to phones
FR340856A (en) Improvements to davits
FR339682A (en) Improvements to telephone devices
FR339455A (en) Improvements to jealousies
FR343255A (en) Improvements to velocipeds
FR345775A (en) Improvements to aviaplanes
FR348690A (en) Improvements to the rides
FR352047A (en) Improvements to suspenders
FR344102A (en) Improvements to gasifiers
FR345466A (en) Improvements to gasifiers
FR345095A (en) Improvements to gasifiers
FR339439A (en) Improvements to secateurs
FR347179A (en) Telephone receiver
FR348401A (en) Telephone receiver
FR350203A (en) Phone enhancements
CH31257A (en) Telephone receiver
FR340065A (en) Improvements to sinks
FR343214A (en) Improvements to electrical block-systems
FR339712A (en) Improvements to presses
FR347680A (en) Improvements to taps
FR343061A (en) Improvements to mowers
FR343428A (en) Improvements to telautograph devices