FR320462A - Kind of microphone - Google Patents

Kind of microphone

Info

Publication number
FR320462A
FR320462A FR320462DA FR320462A FR 320462 A FR320462 A FR 320462A FR 320462D A FR320462D A FR 320462DA FR 320462 A FR320462 A FR 320462A
Authority
FR
France
Prior art keywords
microphone
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
Rossetter Walter Elliott
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 FR320462A publication Critical patent/FR320462A/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
FR320462D 1902-04-17 1902-04-17 Kind of microphone Expired FR320462A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR320462T 1902-04-17

Publications (1)

Publication Number Publication Date
FR320462A true FR320462A (en) 1902-12-11

Family

ID=1370964

Family Applications (1)

Application Number Title Priority Date Filing Date
FR320462D Expired FR320462A (en) 1902-04-17 1902-04-17 Kind of microphone

Country Status (1)

Country Link
FR (1) FR320462A (en)

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