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
Priority claimed from US06/388,539external-prioritypatent/US4476510A/en
Application filed by Dictaphone CorpfiledCriticalDictaphone Corp
Publication of MX7012EpublicationCriticalpatent/MX7012E/es