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 Ceskoslovenske Z Tezkeho Stroj, Houst FrantisekfiledCriticalCeskoslovenske Z Tezkeho Stroj
Publication of CH293262ApublicationCriticalpatent/CH293262A/de