Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Patent specification
Provisional Specification. Improvements in Aeroplanes. No. 14,836. Date of application, 26th June 1909, Complete specification left, 26th Oct. 1909 - accepted, 14th April 1910. Patent applied for by Auguste Henry of London. 5 pages with three fold out diagrams containing four figures.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.