IANAL, but copying this table in the way they did seems OK under US copyright law.
In the US, some compilations cannot be copyrighted and some can.
Before a Supreme Court decision called Feist, copyright could be based on either "sweat of the brow" or creativity or both. Sweat of the brow is the work of taking data from original sources and putting it together. Creativity is something you add, like choosing what to include. (If I make a mere list of all restaurants at Disneyworld, that's sweat of the brow. If I make a list of the restaurants that are worth visiting, that's creative.)
The Supreme Court decision was about one company copying another company's white pages phone book. (White pages are the simple name/number listings.) The court said sweat of the brow isn't enough. There must be some amount of creativity. It's a low bar, but it has to be there. So they said the white pages cannot be copyrighted, and copying the entire thing is allowed.
About these LK-99 tables, the "Notes" and "Reliability of Claim" columns of the original table look creative to me. So I'd guess the table can be copyrighted. But the copy of the table didn't include those columns. It just included the factual data, and I think that's allowed.
In the US, some compilations cannot be copyrighted and some can.
Before a Supreme Court decision called Feist, copyright could be based on either "sweat of the brow" or creativity or both. Sweat of the brow is the work of taking data from original sources and putting it together. Creativity is something you add, like choosing what to include. (If I make a mere list of all restaurants at Disneyworld, that's sweat of the brow. If I make a list of the restaurants that are worth visiting, that's creative.)
The Supreme Court decision was about one company copying another company's white pages phone book. (White pages are the simple name/number listings.) The court said sweat of the brow isn't enough. There must be some amount of creativity. It's a low bar, but it has to be there. So they said the white pages cannot be copyrighted, and copying the entire thing is allowed.
About these LK-99 tables, the "Notes" and "Reliability of Claim" columns of the original table look creative to me. So I'd guess the table can be copyrighted. But the copy of the table didn't include those columns. It just included the factual data, and I think that's allowed.
Sources:
(1) https://en.wikipedia.org/wiki/Copyright_in_compilation
(2) https://www.copyright.gov/reports/db4.pdf (Sections IA and IB give the basic idea.)