FR22152E - New micro-telephone device - Google Patents

New micro-telephone device

Info

Publication number
FR22152E
FR22152E FR22152A FR22152DA FR22152E FR 22152 E FR22152 E FR 22152E FR 22152 A FR22152 A FR 22152A FR 22152D A FR22152D A FR 22152DA FR 22152 E FR22152 E FR 22152E
Authority
FR
France
Prior art keywords
telephone device
new micro
micro
new
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
FR22152A
Other languages
French (fr)
Inventor
Rene Darmezin Du Rousset
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.)
RENE DARMEZIN DU ROUSSET
Original Assignee
RENE DARMEZIN DU ROUSSET
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 RENE DARMEZIN DU ROUSSET filed Critical RENE DARMEZIN DU ROUSSET
Application granted granted Critical
Publication of FR22152E publication Critical patent/FR22152E/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
    • H04R21/028—Microphones with a fluid as resistance material

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR22152A 1915-10-28 1915-10-28 New micro-telephone device Expired FR22152E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR22152T 1915-10-28

Publications (1)

Publication Number Publication Date
FR22152E true FR22152E (en) 1921-05-14

Family

ID=8661068

Family Applications (2)

Application Number Title Priority Date Filing Date
FR22152A Expired FR22152E (en) 1915-10-28 1915-10-28 New micro-telephone device
FR492615A Expired FR492615A (en) 1915-10-28 1918-10-29 Manufacturing process for glues and other similar materials

Family Applications After (1)

Application Number Title Priority Date Filing Date
FR492615A Expired FR492615A (en) 1915-10-28 1918-10-29 Manufacturing process for glues and other similar materials

Country Status (1)

Country Link
FR (2) FR22152E (en)

Also Published As

Publication number Publication date
FR492615A (en) 1919-07-11

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