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.)
Publication of IT514564ApublicationCriticalpatent/IT514564A/it
H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
H03K17/54—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements of vacuum tubes
