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FR481479A - Thermal phone - Google Patents

Thermal phone

Info

Publication number
FR481479A
FR481479A FR481479DA FR481479A FR 481479 A FR481479 A FR 481479A FR 481479D A FR481479D A FR 481479DA FR 481479 A FR481479 A FR 481479A
Authority
FR
France
Prior art keywords
phone
thermal
thermal phone
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.)
DE NL THERMO TELEPHOON MIJ NV
Original Assignee
DE NL THERMO TELEPHOON MIJ NV
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 DE NL THERMO TELEPHOON MIJ NV filed Critical DE NL THERMO TELEPHOON MIJ NV
Application granted granted Critical
Publication of FR481479A publication Critical patent/FR481479A/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
    • H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
    • H04R23/002—Transducers other than those covered by groups H04R9/00 - H04R21/00 using electrothermic-effect transducer

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Thermal Insulation (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
FR481479D 1915-04-26 1916-04-12 Thermal phone Expired FR481479A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE296331T 1915-04-26

Publications (1)

Publication Number Publication Date
FR481479A true FR481479A (en) 1916-12-08

Family

ID=32605103

Family Applications (1)

Application Number Title Priority Date Filing Date
FR481479D Expired FR481479A (en) 1915-04-26 1916-04-12 Thermal phone

Country Status (4)

Country Link
DE (1) DE296331C (en)
FR (1) FR481479A (en)
GB (1) GB191513902A (en)
NL (1) NL4110C (en)

Also Published As

Publication number Publication date
GB191513902A (en) 1916-09-28
DE296331C (en)
NL4110C (en)

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