He wouldn't have been granted a patent because it was invented in the 1930s when he was still a child.
Then why has it not been recreated?
It has. For example they're commonly used to power used in warehouses because the only exhaust is water, no risk of carbon monoxide poisoning.
They're not used for road vehicles because of the challenges involved in building out the infrastructure needed, also EVs are massively subsidised by comparison.
Sounds like bullshit to me.
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