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Application filed by IndividualfiledCriticalIndividual
Priority to FR7411918ApriorityCriticalpatent/FR2266410A1/fr
Publication of FR2266410A1publicationCriticalpatent/FR2266410A1/fr
Application grantedgrantedCritical
Publication of FR2266410B3publicationCriticalpatent/FR2266410B3/fr
H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
H04R1/00—Details of transducers, loudspeakers or microphones
H04R1/12—Sanitary or hygienic devices for mouthpieces or earpieces, e.g. for protecting against infection
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Health & Medical Sciences
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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
(AREA)
Catching Or Destruction
(AREA)
FR7411918A1974-03-291974-03-29Permanent disinfection of microphones and earphones - using volatile matl. capable of replacement or regeneration
GrantedFR2266410A1
(en)
