FR790237A - Dispositif électrique permettant une désinfection automatique des appareils téléphoniques par vaporisation instantanée de liquides
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Dispositif électrique permettant une désinfection automatique des appareils téléphoniques par vaporisation instantanée de liquides
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H04M1/00—Substation equipment, e.g. for use by subscribers
H04M1/02—Constructional features of telephone sets
H04M1/17—Hygienic or sanitary devices on telephone equipment
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FR790237D1935-05-181935-05-18Dispositif électrique permettant une désinfection automatique des appareils téléphoniques par vaporisation instantanée de liquides
ExpiredFR790237A
(fr)