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 US07/056,066external-prioritypatent/US4834601A/en
Application filed by Klaas SchaapfiledCriticalKlaas Schaap
Publication of NO890374LpublicationCriticalpatent/NO890374L/en
Publication of NO890374D0publicationCriticalpatent/NO890374D0/en