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Nor would I assume, cheap. If the community wanted to fundraise to get the patent invalidated, what sort of money are we talking about? How much if they decide to contest the invalidation? $10,000,? $100,000? $1,000,000? I'm sure it depends on a lot of factors, but getting an idea of how many zeros we're talking about would be useful.

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Again speaking generally, attempting to invalidate a patent is going to cost more than $10k, but $100k should be enough to do an ex partes review petition. If you want to do inter partes review, which is much more involved but may also have a higher chance of success, it's more expensive. The total cost will depend on what attorneys you use and how they go about it (which also impacts the likelihood of success).

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