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 US07/141,693external-prioritypatent/US4935906A/en
Application filed by Span IncfiledCriticalSpan Inc
Publication of NO902962D0publicationCriticalpatent/NO902962D0/en
Publication of NO902962LpublicationCriticalpatent/NO902962L/en