But that doesn't matter. If a patent is granted, choosing to infringe on it is risky, even if you believe you could make a solid argument that it's invalid given enough lawyer hours.
A few years earlier, Google was granted a patent for ANS in general, which made people very angry. Fortunately they never did anything with it.
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The fact that Google does have a patent which covers JXL is worrying though. So JXL is patent encumbered after all.