zouzounaki
Olympian
- Joined
- Dec 13, 2016
- Messages
- 36,321
It means the patent only exists in America. Because the electronic control of a electrical heating element was developed decades before, using science that was worked out in the 19th century.
But only in the rest of the world, then? You’ll have to forgive me, not being an inventor, I know nothing about this stuff.
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