FR480856A - Procédé de fabrication de conducteurs de chaleur pour téléphone thermique à l'aide de fils obtenus d'après le procédé wollaston
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Procédé de fabrication de conducteurs de chaleur pour téléphone thermique à l'aide de fils obtenus d'après le procédé wollaston
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DE NL THERMO TELEPHOON MIJ NV
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DE NL THERMO TELEPHOON MIJ NV
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Application filed by DE NL THERMO TELEPHOON MIJ NVfiledCriticalDE NL THERMO TELEPHOON MIJ NV
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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
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Physics & Mathematics
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Engineering & Computer Science
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Acoustics & Sound
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Signal Processing
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Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups
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Resistance Heating
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Wire Processing
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FR480856D1915-02-091916-02-04Procédé de fabrication de conducteurs de chaleur pour téléphone thermique à l'aide de fils obtenus d'après le procédé wollaston
ExpiredFR480856A
(fr)