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
Application filed by Ledeboer P H DrfiledCriticalLedeboer P H Dr
Priority to NL93ApriorityCriticalpatent/NL325C/en
Application grantedgrantedCritical
Publication of NL325CpublicationCriticalpatent/NL325C/en