Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Patent specification
Patents and Designs Act, 1907. Form No. 3 Complete Specification. No. 9050 Dated June 27th 1916. Improvements in or Connected with Sparking Plugs. Patent applied for by Charles Horace Watkins of 45 Colum Road, Cardiff. 6 pages held together top left by metal clip.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.