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 Louis Backie JohnfiledCriticalLouis Backie John
Publication of CH302324ApublicationCriticalpatent/CH302324A/fr
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
Landscapes
Health & Medical Sciences
(AREA)
Public Health
(AREA)
Engineering & Computer Science
(AREA)
Signal Processing
(AREA)
CH302324D1952-01-211952-01-23Procédé pour la stérilisation des appareils de téléphones et équipement pour la mise en oeuvre de ce procédé.
CH302324A
(fr)