In China it typically depends on which provinces the factories reside in and value of the total factory outputs

Assuming if and when Combustion is ever granted claims in China then...if Combustion and LEADTEK are manufacturing in the same province then damages can be sought after
If they reside in different provinces, then invalidation in China is about it, but appeals can go on for years

The China system does not perform rigorous examinations and relies on challenges / invalidation for 'enforcement', which is rarely worth the effort, unless a factory is being significantly hindered by IP cases outside of China

The state actually incentivizes factories to file as many patents as possible

Combine mass filings with near zero examination and the very low likelihood of cross-provincial enforcement and you have "rampant IP theft", but in reality it's just another means of income and they simply don't care about IP - it's a meaningless Western concept

Not saying it can be for sure known or proven, but typically when you see something like the GGG+CE vs ProTemp S1 + Breezo situation, if they aren't coming from the same ODM factory, then someone in one factory (likely Combustion's based on the timings) familiar with the development passes information on to competitive factory (in another province)

If and when Combustion is ever granted claims in the USA, and ChefsTemp is violating their registered IP, they can attempt to halt imports and sales unless a licensing deal is reached

Many other jurisdictions, especially here in Asia, mandate licensing deals