FR41374E - Improvements to sound amplifiers - Google Patents

Improvements to sound amplifiers

Info

Publication number
FR41374E
FR41374E FR41374DA FR41374E FR 41374 E FR41374 E FR 41374E FR 41374D A FR41374D A FR 41374DA FR 41374 E FR41374 E FR 41374E
Authority
FR
France
Prior art keywords
sound amplifiers
amplifiers
sound
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
Helene Kanders
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 filed Critical
Application granted granted Critical
Publication of FR41374E publication Critical patent/FR41374E/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K13/00—Cones, diaphragms, or the like, for emitting or receiving sound in general

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
FR41374D 1931-08-17 1931-08-17 Improvements to sound amplifiers Expired FR41374E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR41374T 1931-08-17

Publications (1)

Publication Number Publication Date
FR41374E true FR41374E (en) 1933-01-07

Family

ID=8677542

Family Applications (1)

Application Number Title Priority Date Filing Date
FR41374D Expired FR41374E (en) 1931-08-17 1931-08-17 Improvements to sound amplifiers

Country Status (1)

Country Link
FR (1) FR41374E (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2643727A (en) * 1950-01-31 1953-06-30 Elipson S A Sound transmitting device with an ellipsoidal reflector
US2732907A (en) * 1950-01-31 1956-01-31 Sound transducers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2643727A (en) * 1950-01-31 1953-06-30 Elipson S A Sound transmitting device with an ellipsoidal reflector
US2732907A (en) * 1950-01-31 1956-01-31 Sound transducers

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