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 Louis R Fechtig, William Stephen CopelandfiledCriticalLouis R Fechtig
Application grantedgrantedCritical
Publication of AT5796BpublicationCriticalpatent/AT5796B/de