FR364901A - Telephone transmitter - Google Patents

Telephone transmitter

Info

Publication number
FR364901A
FR364901A FR364901DA FR364901A FR 364901 A FR364901 A FR 364901A FR 364901D A FR364901D A FR 364901DA FR 364901 A FR364901 A FR 364901A
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)
Inventor
Robert Bines
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR364901A publication Critical patent/FR364901A/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
    • H04R21/021—Microphones with granular resistance material

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR364901D 1906-04-04 1906-04-04 Telephone transmitter Expired FR364901A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR364901T 1906-04-04

Publications (1)

Publication Number Publication Date
FR364901A true FR364901A (en) 1906-08-31

Family

ID=1412219

Family Applications (1)

Application Number Title Priority Date Filing Date
FR364901D Expired FR364901A (en) 1906-04-04 1906-04-04 Telephone transmitter

Country Status (1)

Country Link
FR (1) FR364901A (en)

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