Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Patent specification
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.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.