These cookies are absolutely essential for our website to function properly.
We use Google Analytics to measure how you use the website so we can improve it based on user needs.
These cookies may be set by third party websites and do things like measure how you view YouTube videos.
Amgueddfa Cymru – Museum Wales
Provisional Specification. Improvements in and relating to Flying Machines. No. 19,619. Date of application, 26th August 1909, Complete specification left, 29th March 1909 - accepted, 15th August 1910. Patent applied for by Willibald Franz Zelger of London. 5 pages with fold out diagram containing two figures.
