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 GB08216872Aexternal-prioritypatent/GB2112846A/en
Application filed by David Arthur Pritchard, Michael Joseph DonnellyfiledCriticalDavid Arthur Pritchard
Publication of HK92090ApublicationCriticalpatent/HK92090A/en