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 GB838300923Aexternal-prioritypatent/GB8300923D0/en
Priority claimed from GB838315506Aexternal-prioritypatent/GB8315506D0/en
Application filed by Vgl Ind LtdfiledCriticalVgl Ind Ltd
Publication of PT77687ApublicationCriticalpatent/PT77687A/en
Publication of PT77687BpublicationCriticalpatent/PT77687B/en