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		Proof-of-work based on hash mining for reducing spam attacks (uspto.gov)
		2 points by simonebrunozzi on July 29, 2020 \| hide \| past \| favorite \| 1 comment

z573 on July 29, 2020 [–]

Not familiar with the patent system, but this looks like HashCash https://en.m.wikipedia.org/wiki/Hashcash

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