Replying to @Glowstick@lemmy.world
Piggybacking on Gmac’s excellent comment, here’s some additional detail:
Alexander Fleming (Scottish) - penicillin
John Shepherd-Barron (English) - ATM (although this was a synthesis of many previous inventions/ concepts from other countries)
James Clerk Maxwell (Scot) - colour photography
Da Vinci (modern day Italy) - contact lenses
Alexander Cumming (scot) - S-bend
Various nationalities helped develop the internal combustion engine
Robert William Thomson (scot) - pneumatic tyre