FR342950A - Telephone transmitter - Google Patents

Telephone transmitter

Info

Publication number
FR342950A
FR342950A FR342950DA FR342950A FR 342950 A FR342950 A FR 342950A FR 342950D A FR342950D A FR 342950DA FR 342950 A FR342950 A FR 342950A
Authority
FR
France
Prior art keywords
telephone transmitter
telephone
transmitter
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.)
AMERICAN ELECTRIC TELEPHONE CO
Original Assignee
AMERICAN ELECTRIC TELEPHONE CO
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 AMERICAN ELECTRIC TELEPHONE CO filed Critical AMERICAN ELECTRIC TELEPHONE CO
Application granted granted Critical
Publication of FR342950A publication Critical patent/FR342950A/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
    • H04R21/00—Variable-resistance transducers
    • H04R21/02—Microphones
    • H04R21/023—Microphones with more than one granular chamber

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR342950D 1904-04-05 1904-04-05 Telephone transmitter Expired FR342950A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR342950T 1904-04-05

Publications (1)

Publication Number Publication Date
FR342950A true FR342950A (en) 1904-09-21

Family

ID=1391919

Family Applications (1)

Application Number Title Priority Date Filing Date
FR342950D Expired FR342950A (en) 1904-04-05 1904-04-05 Telephone transmitter

Country Status (1)

Country Link
FR (1) FR342950A (en)

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