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 British Electric Traction Co L, Thomas Ash And Co Ltd, Alfred Grahan SleefiledCriticalBritish Electric Traction Co L
Priority to IE21554ApriorityCriticalpatent/IE20898L/en
Publication of IE20898LpublicationCriticalpatent/IE20898L/en