FR480775A - Dispositif applicable à la téléphonie ou autres arts similaires - Google Patents

Dispositif applicable à la téléphonie ou autres arts similaires

Info

Publication number
FR480775A
FR480775A FR480775A FR480775DA FR480775A FR 480775 A FR480775 A FR 480775A FR 480775 A FR480775 A FR 480775A FR 480775D A FR480775D A FR 480775DA FR 480775 A FR480775 A FR 480775A
Authority
FR
France
Prior art keywords
telephony
device applicable
similar arts
arts
similar
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
FR480775A
Other languages
English (en)
French (fr)
Inventor
Harald Smith
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 FR480775A publication Critical patent/FR480775A/fr
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)
  • Arrangements For Transmission Of Measured Signals (AREA)
FR480775A 1914-11-14 1916-01-26 Dispositif applicable à la téléphonie ou autres arts similaires Expired FR480775A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US480775XA 1914-11-14 1914-11-14

Publications (1)

Publication Number Publication Date
FR480775A true FR480775A (fr) 1916-09-21

Family

ID=6091213

Family Applications (1)

Application Number Title Priority Date Filing Date
FR480775A Expired FR480775A (fr) 1914-11-14 1916-01-26 Dispositif applicable à la téléphonie ou autres arts similaires

Country Status (2)

Country Link
DE (1) DE299313C (enrdf_load_stackoverflow)
FR (1) FR480775A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
DE299313C (enrdf_load_stackoverflow)

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